The 3 phases of the gospel.
(1) The commission :
Mark 16:15-16
And he said unto them, Go ye into all the world, and preach the gospel to every creature.
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
Approximately 2000 years later during 2nd exodus comes the human ending:
Hebrews 8:11
And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest.
Jeremiah 31:34
And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
1260 days after 2nd Exodus (3 1/2 years)
At the start of great Tribulation an angel will preach to those that missed the Marriage Supper Of The Lamb.
Revelation 14:6-7
And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people,
Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.
https://youtu.be/mY9GC0kQc1E