She hath given her hand— Giving the hand, is a token of consenting to any conditions offered. See Exodus 10:15 and Lamentations 5:6. Dare manus, (to give the hand,) in Latin signifies, to yield; and most probably alludes to the act of the vanquished, who, throwing down his arms, and stretching forth his defenceless hands, acknowledges himself to be in the victor's power.
Related Commentaries of Jeremiah 50:15
Jeremiah 50:15
15 Shout against her round about: she hath given her hand: her foundations are fallen, her walls are thrown down: for it is the vengeance of the LORD: take vengeance upon her; as she hath done, do unto her.