Exodus 29:23-28

29:23 and one round flat cake of bread, one perforated cake of oiled bread, and one wafer from the basket of bread made without yeast that is before the Lord. 29:24 You are to put all these in Aaron’s hands and in his sons’ hands, and you are to wave them as a wave offering before the Lord. 29:25 Then you are to take them from their hands and burn them on the altar for a burnt offering, for a soothing aroma before the Lord. It is an offering made by fire to the Lord. 29:26 You are to take the breast of the ram of Aaron’s consecration; you are to wave it as a wave offering before the Lord, and it is to be your share. 29:27 You are to sanctify the breast of the wave offering and the thigh of the contribution, which were waved and lifted up as a contribution from the ram of consecration, from what belongs to Aaron and to his sons. 29:28 It is to belong to Aaron and to his sons from the Israelites, by a perpetual ordinance, for it is a contribution. It is to be a contribution from the Israelites from their peace offerings, their contribution to the Lord.

Leviticus 7:30

7:30 With his own hands he must bring the Lord’s gifts. He must bring the fat with the breast to wave the breast as a wave offering before the Lord,

Leviticus 8:27

8:27 He then put all of them on the palms of Aaron and his sons, who waved them as a wave offering before the Lord.