1 Kings 20:31

31But his servants said to him, “We have heard that the kings of the house (royal line) of Israel are merciful kings. Please let us put sackcloth around our 20:31 I.e. the midsection of the body between the lower ribs and the hips.loins and ropes on our necks [as symbols of submission], and go out to the king of Israel; perhaps he will spare your life.”