Cross reference
Exodus 29:16
16 Then let it be put to death, so that the sides of the altar are marked with its blood.
Exodus 29:11-12
11 And you are to put the ox to death before the Lord at the door of the Tent of meeting.
12 Then take some of the blood of the ox, and put it on the horns of the altar with your finger, draining out all the rest of the blood at the base of the altar.