Exodus 29:11
Then you are to slaughter the bull in the LORD's presence at the doorway of the Tent of Meeting.
Exodus 29:4
You are to bring Aaron and his sons to the doorway of the Tent of Meeting, and wash them with water.
Leviticus 1:3-5
if his offering is a burnt offering from the herd, he is to bring a male without any defect. He is to present it at the entrance to the Tent of Meeting. At the appointed time, it is to be presented in the presence of the LORD so that he may be accepted.
Leviticus 8:15
So Moses slaughtered it, took the blood, and applied some of it at the horns of the altar and around it with his fingers, thus purifying the altar. Then he poured the blood at the base of the altar, thereby sanctifying it as a means to make atonement with it.
Leviticus 9:8
So Aaron drew near to the altar and slaughtered the calf for a sin offering on behalf of himself.
Leviticus 9:12
And so the burnt offering was slaughtered, and Aaron's sons secured for him the blood, which he poured on the altar and around it.