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.
Leviticus 4:15
4:15 the elders of the congregation must lay their hands on the head of the bull before the Lord, and someone must slaughter the bull before the Lord.
Leviticus 8:14
Consecration Offerings
8:14 Then he brought near the sin offering bull and Aaron and his sons laid their hands on the head of the sin offering bull,