"29Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken: 30And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory. 31And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other."
https://biblehub.com/kjv/matthew/24.htm
"The Return of the Lord
13But I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope. 14For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him. 15For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep. 16For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: 17Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord. 18Wherefore comfort one another with these words."
https://biblehub.com/kjv/1_thessalonians/4.htm
"13And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they? 14And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb. 15Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them."
https://biblehub.com/kjv/revelation/7.htm