And you shall take of the blood of the bullock, and put it upon the horns of the altar with your finger, and pour all the blood beside the bottom of the altar.
All Commentaries on Exodus 29:12 Go To Exodus 29
George Leo Haydock
AD 1849
Horns. This was done in all the sacrifices of expiation. After Aaron was ordained, he carried the blood into the sanctuary, for the sins of all. (Calmet)