Leviticus 7:32-34

32You are to give the right thigh to the priest as a contribution from your fellowship sacrifices.

33The son of Aaron who presents the blood of the fellowship offering and the fat will have the right thigh as a portion.

34I have taken from the Israelites the breast of the presentation offering and the thigh of the contribution from their fellowship sacrifices, and have assigned them to the priest Aaron and to his sons as a permanent portion from the Israelites.”