Really? What happened to the days when you were having a discussion about a particular topic, that people would give relevant verses relating to the topic that is being discussed? Miss those days i do.
Let us see if Galation 4:26 has anything to do with the Holy City Jerusalem that is coming to the Earth according to Rev 21 and 22.
Gal 4:21 Tell me, ye that desire to be under the law, do ye not hear the law?
Gal 4:22 For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
Gal 4:23 But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
Gal 4:24 Which things are an ALLEGORY: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.
Gal 4:25 For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
Gal 4:26 But Jerusalem which is above is free, which is the mother of us all. (Because we are all of Abrahams seed)
Absolutely NOTHING to do with the Holy City Jerusalem coming down from Heaven, when Jesus Returns at the 7th Trumpet sounding, IN THE FUTURE.
Joh_14:2-3 In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you (HOLY CITY JERUSALEM). And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also. (RAPTURE, and He will be in the Holy City Jerusalem).
Heb 11:10 For he looked for a city which hath foundations, whose builder and maker is God. (HOLY CITY JERUSALEM)
This City, has NOT came down to EARTH yet, you do error believing that false doctrine.