Therefore comfort one another with these words.

Which words? The following:

For the Lord Himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first. Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord.

Therefore comfort each other and edify one another, just as you also are doing.

For God did not appoint us to wrath, but to obtain salvation through our Lord Jesus Christ, who died for us, that whether we wake or sleep, we should live together with Him.

For you yourselves know perfectly that the day of the Lord so comes as a thief in the night. For when they say, “Peace and safety!” then sudden destruction comes upon them, as labor pains upon a pregnant woman. And they shall not escape.

Watch therefore, and pray always that you may be counted worthy to escape all these things that will come to pass, and to stand before the Son of Man.
Because you have kept My command to persevere, I also will keep you from the hour of trial which shall come upon the whole world, to test those who dwell on the earth.

Behold, I tell you a mystery: We shall not all sleep, but we shall all be changed, in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we shall be changed.

Remember therefore how you have received and heard; hold fast and repent. Therefore if you will not watch, I will come upon you as a thief, and you will not know what hour I will come upon you.

Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.

1 Thessalonians 4 : 18.
I Thessalonians 4:16-17.
I Thessalonians 5:11.
I Thessalonians 5:9-10.
I Thessalonians 5:2-3.
Luke 21:36.
Revelation 3:10.
I Corinthians 15:51-52.
Revelation 3:3.
Matthew 25 : 13.