Jeremiah 51:45

"My people, Go ye out of the midst of her, and save yourselves every man from the fierce anger of Jehovah, and let not your heart faint, neither fear ye for the tidings that shall be found in the land; for tidings shall come one year, and after that in another year shall come tidings, and violence is in the land, ruler against ruler. Therefore, behold, the days come, that I will execute judgment upon the graven images of Babylon; and her whole land shall be confounded; and all her slain shall fall in the midst of her. Thus the heavens and the earth, and all that is therein, shall sing for joy over Babylon, for the destroyers shall come unto her from the north, saith Jehovah. As Babylon hath caused the slain of Israel to fall, so at Babylon shall fall the slain of all the land."

"All her slain shall fall in the midst of her ..." (Jeremiah 51:47). Harrison noted that this passage will bear the translation: "Just as the whole earth's slain have fallen for Babylon, so at Babylon the whole earth's slain shall fall."[19] Certainly this idea must be in the passage, because of what God said through the apostle John.

"And in her (Mystery Babylon, the Great Harlot) was found the blood of prophets and of saints, and of all that have been slain upon the earth" (Revelation 18:24).

Jeremiah 51:44-46 are taken from Jeremiah 49:19-21. See my comments there.