On the side of the altar northward. — As the place for the refuse was on the east side (see Leviticus 1:16), as the laver stood on the west side, and as the ascent to the altar was on the south side, the north side was the most convenient for slaughtering the victims. This also applies to the sin and trespass offerings (Leviticus 4:24; Leviticus 4:29; Leviticus 4:33; Leviticus 6:25; Leviticus 7:2; Leviticus 14:13, &c.).
Related Commentaries of Leviticus 1:11
Leviticus 1:11
11 And he shall kill it on the side of the altar northward before the LORD: and the priests, Aaron's sons, shall sprinkle his blood round about upon the altar.