TSK · Exodus 27:2

With this he made the sockets to the door of the Tent of Meeting, the bronze altar, the bronze grating for it, all the vessels of the altar,

He shall put some of the blood on the horns of the altar which is before Yahweh, that is in the Tent of Meeting; and the rest of the blood he shall pour out at the base of the altar of burnt offering, which is at the door of the Tent of Meeting.

He killed it; and Moses took the blood, and put it around on the horns of the altar with his finger, and purified the altar, and poured out the blood at the base of the altar, and sanctified it, to make atonement for it.

even the censers of these sinners against their own lives; and let them be made beaten plates for a covering of the altar: for they offered them before Yahweh; therefore they are holy; and they shall be a sign to the children of Israel."

The news came to Joab; for Joab had turned after Adonijah, though he didn't turn after Absalom. Joab fled to the Tent of Yahweh, and caught hold on the horns of the altar.

Yahweh is God, and he has given us light. Bind the sacrifice with cords, even to the horns of the altar.