Jewish Publication Society of America Version (JPS1917) - Jeremiah 21:4 >

Thus saith the LORD, the God of Israel: Behold, I will turn back the weapons of war that are in your hands, wherewith ye fight against the king of Babylon, and against the Chaldeans, that besiege you without the walls, and I will gather them into the midst of this city.

King James Version (KJV) - Jeremiah 21:4 >

Thus saith the LORD God of Israel; Behold, I will turn back the weapons of war that [are] in your hands, wherewith ye fight against the king of Babylon, and [against] the Chaldeans, which besiege you without the walls, and I will assemble them into the midst of this city.

Berean Study Bible (BSB) - Jeremiah 21:4 >

this is what the LORD, the God of Israel, says: ‘I will turn against you the weapons of war in your hands, with which you are fighting the king of Babylon and the Chaldeans who besiege you outside the wall, and I will assemble their forces in the center of this city.