Exodus 29:12

Thou shalt take of the blood... and put it upon the horns of the altar. — It has been already noticed that the virtue of the altar was considered to reside especially in its horns; hence fugitives clung to them (1 Kings 1:50; 1 Kings 2:28). In all sin offerings it was required (1) That some of the victim’s blood should be smeared upon the altar’s horns; and (2) That the remainder should be poured at its base (Leviticus 4:7; Leviticus 4:18; Leviticus 4:30; Leviticus 4:34).