1 Kings 2:28-29

When this news reached Joab, this Joab who had conspired with Adonijah (although he had remained loyal in the Absalom affair), he took refuge in the sanctuary of GOD, seizing the horns of the Altar and holding on for dear life. King Solomon was told that Joab had escaped to the sanctuary of GOD and was clinging to the Altar; he immediately sent Benaiah son of Jehoiada with orders, “Kill him.”