Leviticus 1:11

and he shall kill it on the north side of the altar before the Lord , and Aaron’s sons the priests shall throw its blood against the sides of the altar .

You are to slaughter it at the north side of the altar before the Lord, and Aaron`s sons the priests shall splash its blood against the sides of the altar.

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.