Leviticus 3:8

3:8 He must lay his hand on the head of his offering and slaughter it before the Meeting Tent, and the sons of Aaron must splash its blood against the altar’s sides.

Leviticus 4:4

4:4 He must bring the bull to the entrance of the Meeting Tent before the Lord, lay his hand on the head of the bull, and slaughter the bull before the Lord.