The Scriptures are replete with passages in relation to this event, but I can here refer only to a few. When John the Revelator was about to foretell the downfall of Babylon, he says:
"And I heard another voice from heaven, saying, Come out of her, my people, that ye may not be partakers of her sins, and that ye receive not of her plagues. For her sins have reached to heaven, and God has remembered her iniquities. Reward her even as she rewarded you and double unto her double according to her works: in the cup which she hath filled, fill to her double" (Rev. xviii, 4-6).
The Psalmist bears this testimony:
"Our God shall come, and shall not keep silence: a fire shall devour before him and it shall be very tempestuous round about him. He shall call to the heavens from above, and to the earth, that he may judge his people. Gather my saints together unto me; those that have made a covenant with me by sacrifice. And the heavens shall declare his righteousness: for God is judge himself" (Psalm i, 3-6).
So Isaiah:
"And it shall come to pass in the last days, that the mountain of the Lord's house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it" (Isaiah ii, 2-4).
"And he will lift up an ensign to the nations from afar, and will hiss unto them from the end of the earth: and, behold, they will come with speed swiftly" (Isaiah v, 26, 27).
"And he shall set up an ensign for the nations, and shall assemble the outcasts of Israel [not the Jews alone, but all Israel], and gather together the dispersed of Judah from the four corners of the earth" (Isaiah xi, 12).
So Paul:
"Having made known to us the mystery of his will * * * that in the dispensation of the fullness of times he might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in him" (Eph. i, 9, 10).
And lastly, the testimony of Jesus:
"And they shall see the Son of Man coming in the clouds of heaven, with power and great glory. And he shall send his angels with a great sound of trumpet, and they shall gather his elect from the four winds, from one end of heaven to the other" (Matt. xxiv, 30, 31).