and

Leviticus 1:4, 5
He is to lay his hand on the head of the burnt offering, so it can be accepted on his behalf to make atonement for him. . . .

Leviticus 8:15
Moses slaughtered the bull, took some of the blood, and applied it with his finger to all four horns of the altar, purifying the altar. He poured out the rest of the blood at the base of the altar and consecrated it so that atonement could be made on it.

Leviticus 9:8, 12
So Aaron approached the altar and slaughtered the calf as a sin offering for himself. . . .

door

Exodus 29:4
Then bring Aaron and his sons to the entrance to the Tent of Meeting, and wash them with water.

Leviticus 1:3
If one's offering is a burnt offering from the herd, he is to offer an unblemished male. He must bring it to the entrance of the Tent of Meeting for its acceptance before the LORD.