'Mercy' in the Bible

When your people Israel are defeated before the enemy {because} they sinned against you, and [when] they turn to you and confess your name and pray and beg for mercy from you in this house,

Then his servants said to him, "Please now, we have heard that the kings of the house of Israel are kings of mercy. Let us now put sackcloth on around our waists and ropes on our heads. Then let us go out to the king of Israel. Perhaps {he will let you live}."