1 Kings 1:51-52

51And it was told Solomon, saying, “Indeed Adonijah is afraid of King Solomon; for look, he has taken hold of the horns of the altar, saying, ‘Let King Solomon swear to me today that he will not put his servant to death with the sword.’ ”

52Then Solomon said, “If he proves himself a worthy man, not one hair of him shall fall to the earth; but if wickedness is found in him, he shall die.”