Exodus 29:24

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.

Exodus 29:28

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.