1 Kings 1:50-51

50And Adonijah feared Solomon, and he got up and went [to the tabernacle on Mt. Zion] and took hold of the horns of the altar [seeking asylum].

51Now Solomon was told, “Behold, Adonijah is afraid of King Solomon, and behold, he has grasped the horns of the altar [seeking God’s protection], saying, ‘King Solomon must swear to me today that he will not kill his servant with the sword.’ ”