I have given you the rest of Paul's sentence (the context) which tells us what Paul means by departing from "the faith".
No answer here, as to what "the faith" is in?
Please answer the question.
The faith, is a reference to faith in Christ Jesus: ie - "faith in God".
4 Now the Spirit expressly says that in latter times some will depart from the faith, giving heed to deceiving spirits and doctrines of demons,2 speaking lies in hypocrisy, having their own conscience seared with a hot iron, 3 forbidding to marry, and commanding to abstain from foods which God created to be received with thanksgiving by those who believe and know the truth. 4 For every creature of God is good, and nothing is to be refused if it is received with thanksgiving; 5 for it is sanctified by the word of God and prayer.
1 Timothy 4:1-5
...Believe and know the truth is another reference to the truth of the Gospel; faith in Christ Jesus.
I know of at least one group that teaches this. Messianic Judaism teaches that we are to refrain from eating pork, and shrimp, or Lobster because we are to observe the law of Moses, rather than what Jesus and Paul taught about food in the New Testament.
3 forbidding to marry, and commanding to abstain from foods which God created to be received with thanksgiving by those who believe and know the truth. 4 For every creature of God is good, and nothing is to be refused if it is received with thanksgiving; 5 for it is sanctified by the word of God and prayer.
- Here is what Jesus taught about this subject.
- Here is what Paul taught; as he learned from Christ about foods.
14 I know and am convinced by the Lord Jesus that there is nothing unclean of itself; but to him who considers anything to be unclean, to him it is unclean. 15 Yet if your brother is grieved because of your food, you are no longer walking in love. Do not destroy with your food the one for whom Christ died. 16 Therefore do not let your good be spoken of as evil; 17 for the kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit. 18 For he who serves Christ in these things is acceptable to God and approved by men. 19 Therefore let us pursue the things which make for peace and the things by which one may edify another. 20 Do not destroy the work of God for the sake of food. All things indeed are pure, but it is evil for the man who eats with offense. 21 It is good neither to eat meat nor drink wine nor do anything by which your brother stumbles or is offended or is made weak.22 Do you have faith? Have it to yourself before God. Happy is he who does not condemn himself in what he approves. 23 But he who doubts is condemned if he eats, because he does not eat from faith; for whatever is not from faith is sin. Romans 14:14-23
Departing from the faith in Christ Jesus; forbidding to eat certain foods [Kosher] and forbidding the intermarriage between Jew and Gentile, are references to the law of Moses, of which Paul warned the gentile Churches, not to be carried away with this doctrine.
1 Timothy 4:1 is a reference to departing from faith in Christ Jesus, as I have shown from the context from 1 Timothy.
- Now the Spirit expressly says that in latter times some will depart from [Strongs 868] the faith, giving heed to deceiving spirits and doctrines of demons, 1 Timothy 4:1
- 13 But the ones on the rock are those who, when they hear, receive the word with joy; and these have no root, who believe for a while and in time of temptation fall away. [Strongs 868] Luke 8:13
- 12 Beware, brethren, lest there be in any of you an evil heart of unbelief in departing from [Strongs 868] the living God; 13 but exhort one another daily, while it is called “Today,” lest any of you be hardened through the deceitfulness of sin. 14 For we have become partakers of Christ if we hold the beginning of our confidence steadfast to the end, Hebrews 3:12-14
JLB