1 Kings 1:50-52

50 And Adonijah himself was full of fear because of Solomon; and he got up and went to the altar, and put his hands on its horns.

51 And they gave Solomon word of it, saying, See, Adonijah goes in such fear of King Solomon, that he has put his hands on the horns of the altar, saying, Let King Solomon first give me his oath that he will not put his servant to death with the sword.

52 And Solomon said, If he is seen to be a man of good faith, not a hair of him will be touched; but if any wrongdoing is seen in him, he is to be put to death.