I Kings 20:23, 31

Then the servants of the king of Syria said to him, “Their gods are gods of the hills. Therefore they were stronger than we; but if we fight against them in the plain, surely we will be stronger than they.

Then his servants said to him, “Look now, we have heard that the kings of the house of Israel are merciful kings. Please, let us put sackcloth around our waists and ropes around our heads, and go out to the king of Israel; perhaps he will spare your life.”