Leviticus 6:13
6:13 A continual fire must be kept burning on the altar. It must not be extinguished.
Leviticus 8:19
8:19 and he slaughtered it. Moses then splashed the blood against the altar’s sides.
Leviticus 9:8
The Sin Offering for the Priests
9:8 So Aaron approached the altar and slaughtered the sin offering calf which was for himself.