GOD'S WORD® Translation
'This is what the LORD God of Israel says: I'm going to take your weapons away from you. You are using these weapons to fight the king of Babylon as well as the Babylonians who are now blockading you outside the wall. I will bring the Babylonians inside this city.

American Standard Version
Thus saith Jehovah, 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.

Berean Study Bible
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.

Douay-Rheims Bible
Thus saith the Lord, the God of Israel: Behold I will turn back the weapons of war that are in your hands, with which you fight against the king of Babylon, and the Chaldeans, that besiege you round about the walls: and I will gather them together in the midst of this city.

English Revised Version
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 which besiege you, without the walls, and I will gather them into the midst of this city.

King James Bible
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.

World English Bible
Thus says Yahweh, the God of Israel, Behold, I will turn back the weapons of war that are in your hands, with which you fight against the king of Babylon, and against the Chaldeans who besiege you, without the walls; and I will gather them into the midst of this city.

Young's Literal Translation
Thus said Jehovah, God of Israel: Lo, I am turning round the weapons of battle That are in your hand, With which ye do fight the king of Babylon, And the Chaldeans, who are laying siege against you, At the outside of the wall, And I have gathered them into the midst of this city,

Jeremiah 21:4 Additional Translations ...