the "seal of God" is "144", and it means keeping of the first main 4-5 Holy Commandments of the faith
Revelation 14:1-5 "And I looked, and, lo, a Lamb stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads(i.e. thousands of those who keep the main part of His statute of (the) faith - "144"). And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps: And they sung as it were a new song(i.e. and they testified a New Testament) before the throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth. These are they which were not defiled with women(i.e. these are those who do not do spiritual/religious iniquity); for they are virgins(i.e. for they are spiritually poor and heartily pure - see Matthew 5:3,8). These are they which follow the Lamb whithersoever he goeth. These were redeemed from among men, being the firstfruits unto God and to the Lamb. And in their mouth was found no guile: for they are without fault before the throne of God.",
Revelation 21:16 "And he measured the wall thereof, an hundred and forty and four cubits(i.e. the first main 4-5 Holy Commandments of the faith viz. the main Holy statute of (the) faith), according to the measure of a man, that is, of the angel."
the 1st + the other 4 Commandments respectively are:
the first one:
Genesis 2:16-17 "Of every tree of the garden thou mayest freely eat(i.e. you are absolutely free to enjoy all (kinds of) consumptions which the true God has made for you): But of the tree of the knowledge of good and evil, thou shalt not eat of it(i.e. but you must not follow/practise (the) occultism, nor examine it): for in the day that thou eatest thereof thou shalt surely die(i.e. for in the day that you start (to) do it the vitiation will overtake you, because the work of (the) spiritual administration has not been made for you)",
the other four:
Exodus 20:1-11 "And God spake all these words, saying, I am the LORD thy God(i.e. I Am the only true Lord God), which have brought thee out of the land of Egypt(i.e. out of the world of occultism and idolatry), out of the house of bondage(i.e. out of the bondage of the system of spiritual/religious iniquity).
1. Thou shalt have no other gods before me(i.e. you must not have any god/lord except Those Ones Who really are the true God Father and the true Lord Jesus Christ).
2. Thou shalt not make unto thee any graven image(i.e. you must not invent any spiritual/religious knowledge), or any likeness(i.e. or any spiritual/religious practice) of(i.e. with/in reference to) any thing that is in heaven above, or that is in the earth beneath, or that is in the water(i.e. in the occult) under the earth: Thou shalt not(i.e. and if there is already such found/invented by any human, then you must not) bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity(i.e. the spiritual/religious iniquity) of the fathers(i.e. of the initiators) upon the children(i.e. their proselytes/disciples) unto the third and fourth generation(i.e. unto its third and fourth extent/grade) of them that hate me; And shewing mercy unto thousands of them that love me, and keep my commandments.
3. Thou shalt not take the name of the LORD thy God in vain(i.e. you must not use the faith against the Will of the true Lord God); for the LORD will not hold him guiltless that taketh his name in vain(i.e. because He does not rate sinless that who use the faith for unclean/unrighteous/bad purpose(-s)).
4. Remember the sabbath day(i.e. remember the precarious situation of Creature/Creation while the true God is in state of millennial somnolence/drowse), to keep it(i.e. to keep the Creature/Creation) holy. Six days shalt thou labour, and do all thy work(i.e. in principle you are absolutely free to do anything whereby there is no a causation of evil to any human): But the seventh day is the sabbath of the LORD thy God(i.e. but while the true God is still in state of somnolence/drowse): in it thou shalt not do any work(i.e. you must not omit to keep/restore the: Peace, Purity, Sanctity, Good, Virtue, Benediction, and Welfare of all humans, which things God from the beginning laid to be for all of them), thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle(i.e. nor in your work(-s)), nor thy stranger that is within thy gates(i.e. that are in the faith): For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day(i.e. and He has fallen into a state of millennial somnolence/drowse from the seventh day on): wherefore the LORD blessed the sabbath day(i.e. the time during which He will be in that state), and hallowed it(viz. with a view to give the most perfect chance to the spiritual servants to sanctify the Creature/Creation while He is in state of millennial somnolence/drowse)."
the same Commandments are also shown in the New Testament:
the first two:
Mark 12:29-30 "The first of all the commandments is, Hear, O Israel(i.e. o believers); The Lord our God is one Lord(i.e. there is a single true Lord God): And thou shalt love the Lord thy God(i.e. and you must entirely believe (in) Him as (in) a God/Lord) with all thy heart(i.e. with all your faith), and with all thy soul, and with all thy mind, and with all thy strength(i.e. and to let Him be all your strength): this is the first commandment.",
1 Corinthians 8:1-8 "Now as touching things(i.e. as regards the religious/spiritual things) offered unto(i.e. which are (a) service/ministry to/of) idols(i.e. spiritual/religious iniquities), we know that(i.e. usually the human tendency in this regard so far was that maybe) we all(i.e. all clerics/believers) have knowledge(i.e. spiritual knowledge and abilities). Knowledge puffeth up(viz. in the faith), but charity(i.e. but Love/Good(-ness)) edifieth(or: humbles). And if(i.e. and if in this regard) any man think that he knoweth any thing, he knoweth nothing yet as he ought to know. But if any man love God(i.e. the true Lord God), the same is known of him. As concerning therefore the eating(i.e. the following/practicing) of those things(i.e. of those spiritual/religious things) that are offered in sacrifice unto idols(or: which are unrighteous), we know that an idol is nothing in the world, and that there is none other God but one. For though there be that are called gods, whether in heaven or in earth, (as there be gods many, and lords(or: and christs) many,) But to us(i.e. but the setup is such that to all humans of whole this universe) there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him. Howbeit there is not in every man(i.e. howbeit there is not in every cleric/believer/worshipper) that knowledge(i.e. that conscience/understanding): for some(i.e. for some of them by reason of this) with conscience of the idol(or: by notion of spiritual iniquity) unto this hour eat it(i.e. unto this moment follow/practise the faith) as a thing offered unto an idol; and their conscience being weak(i.e. thus becoming weak) is defiled. But meat(i.e. but the occultism/idolatry/knowledgeable faith) commendeth us not to God: for neither, if we eat(i.e. if we follow/practise it), are we the better; neither, if we eat not(i.e. if we do not follow/practise it), are we the worse.",
the third:
1 Corinthians 10:24-33 "Let no man(i.e. let no believer) seek his own, but every man another's wealth..... Give none offence, neither to the Jews, nor to the Gentiles, nor to the church of God: Even as I please all men in all things(i.e. in all good things), not seeking mine own profit, but the profit of many(i.e. of (the) others), that they may be saved."
the fourth:
1 Timothy 2:1-10 "I exhort therefore, that, first of all, supplications, prayers, intercessions, and giving of thanks(i.e. blessings), be made for all men(i.e. for all humans); For kings, and for all that are in authority; that we may lead a quiet and peaceable life in all godliness and honesty(i.e. in all goodness and earnestness). For this is good and acceptable in the sight of God our Saviour; Who will have all men(i.e. all humans/souls) to be saved, and to come unto the knowledge of the truth(i.e. and to become good/righteous). For there is one God, and one mediator(also: and one Lord) between God and men, the man(i.e. the ensouled being) Christ Jesus; Who gave himself a ransom for all, to be testified in due time. Whereunto I am ordained a preacher, and an apostle, (I speak the truth in Christ, and lie not; ) a teacher of the Gentiles in faith and verity. I will therefore that men(i.e. that the male believers) pray every where, lifting up holy hands(i.e. entirely showing/manifesting love/goodness), without wrath(i.e. without hostility/aggression) and doubting(i.e. and dramatization/stir/intrigues/strife). In like manner also, that women(i.e. that female believers) adorn themselves in modest apparel(i.e. in humility), with shamefacedness(i.e. with meekness) and sobriety(i.e. and sedation/sanity); not with broided hair(i.e. not with pride), or gold(i.e. or vainglory), or pearls(i.e. or wisdom), or costly array(i.e. or elevation); But (which becometh women professing godliness) with good works.",
1 Timothy 4:1-11 "Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith(i.e. some may deviate from the right faith toward wrong), giving heed to seducing spirits, and doctrines(i.e. creeds) of devils; Speaking(i.e. preaching/testifying/prophesying) lies in hypocrisy; having their conscience seared with a hot iron(i.e. with strong satanic spirituality); Forbidding to marry(i.e. disconcerting and forbidding the sex life), and commanding to abstain from meats(i.e. from natural consumptions), which God hath created to be received with thanksgiving(i.e. which the true God has made/given to be used for good purposes) of them which believe and know the truth(i.e. of those who believe right(-ly) as well as of those who do not do spiritual/religious iniquity). For every creature(i.e. for each creation) of God is good, and nothing to be refused, if it be received with thanksgiving(i.e. if it is used for good purposes): For it is sanctified by the word of God(i.e. of the God's work) and prayer(i.e. and by the prayers of (the) true Saints). If thou put the brethren in remembrance of these things, thou shalt be a good minister of Jesus Christ, nourished up in the words of faith(i.e. of right faith) and of good doctrine(i.e. and of the good creed), whereunto thou hast attained. But refuse profane and old wives' fables(i.e. but avoid the traditions of defiling and misleading creeds), and exercise thyself rather unto godliness(or: unto love/goodness). For bodily(or: for overweening/self-interested) exercise profiteth little: but godliness(or: love/goodness) is profitable unto all things, having promise of the life that now is, and of that which is to come. This is a faithful saying and worthy of all acceptation. For therefore we both labour and suffer reproach, because we trust in the living God, who is the Saviour of all men, specially of those that believe(i.e. that do not commit spiritual/religious iniquity). These things command and teach."
Blessings