Matthew 24 – Jesus tells the Jews about the rapture
“See, I have told you ahead of time. “So if anyone tells you, ‘There he is, out in the wilderness,’ do not go out; or, ‘Here he is, in the inner rooms,’ do not believe it. For as lightning that comes from the east is visible even in the west, so will be the coming of the Son of Man.”
Matthew 24:25-27 NIV
https://bible.com/bible/111/mat.24.25-27.NIV
““But about that day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father. As it was in the days of Noah, so it will be at the coming of the Son of Man. For in the days before the flood, people were eating and drinking, marrying and giving in marriage, up to the day Noah entered the ark; and they knew nothing about what would happen until the flood came and took them all away. That is how it will be at the coming of the Son of Man. Two men will be in the field; one will be taken and the other left. Two women will be grinding with a hand mill; one will be taken and the other left.”
Matthew 24:36-41 NIV
https://bible.com/bible/111/mat.24.36-40.NIV
1 Cor 15 – Paul shares a mystery with Christians (previously never revealed)
“Listen, I tell you a mystery: We will not all sleep, but we will all be changed— in a flash, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, the dead will be raised imperishable, and we will be changed.”
1 Corinthians 15:51-52 NIV
Isai 6:1, joshua 1:1
isaiah 7:4 judges 15:4
isaiah 8:3 ruth 2:23
Isaiah 9:7,12 1 samuel 21:9