Jeremiah 51:20

20 The Lord says, "Babylonia, you are my hammer, my weapon of war. I used you to crush nations and kingdoms,

Jeremiah 51:20 Meaning and Commentary

Jeremiah 51:20

Thou [art] my battle axe [and] weapons of war
This is said by the Lord, either to Cyrus, as some, to which our version inclines, whom God made use of as an instrument to subdue nations and kingdoms, and destroy them; see ( Isaiah 45:1 ) ; or rather Babylon, and the king of it, who had been the hammer of the earth, ( Jeremiah 50:23 ) ; as it may be rendered here, "thou [art] my hammer" F19; or, "hast been"; an instrument in his hands, of beating the nations to pieces, as stones by a hammer, and of destroying them, as by weapons of war: this, and what follows, are observed to show, that though Babylon had been used by the Lord for the destruction of others, it should not be secure from it itself, but should share the same fate; unless this is to be understood of the church of God, and kingdom of Christ, which in the latter day will break in pieces all the kingdoms of the earth, ( Daniel 2:44 ) ; which sense seems to have some countenance and confirmation from ( Jeremiah 51:24 ) "in your sight". The Targum is,

``thou art a scatterer before me, a city in which are warlike arms;''
which seems to refer to Babylon: for with thee will I break in pieces the nations, and with thee will I
destroy kingdoms;
or, "with thee I have broke in pieces, [and] have destroyed"; the future instead of the past F20; as the nations and kingdoms of Judea, Egypt, Edom, Moab, Ammon, and others: or, "that I may break in pieces" F21 and so it expresses the end for which he was a hammer, as well as the use he had been or would be of.
FOOTNOTES:

F19 (yl hta Upm) "malleus es, [vel] fuisti mihi", Pagninus, Piscator, Cocceius, Schmidt.
F20 "Dispersi, perdidi", Lutherus; "conquassavi", Munster; "dissipavi", Piscator.
F21 (ytupnw) "ut dissiparem", Junius & Tremellius; "ut dispergam", Schmidt.

Jeremiah 51:20 In-Context

18 They are worthless and should be despised; they will be destroyed when the Lord comes to deal with them.
19 The God of Jacob is not like them; he is the one who made everything, and he has chosen Israel to be his very own people. The Lord Almighty is his name.
20 The Lord says, "Babylonia, you are my hammer, my weapon of war. I used you to crush nations and kingdoms,
21 to shatter horses and riders, to shatter chariots and their drivers,
22 to kill men and women, to slay old and young, to kill boys and girls,
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.