Exodus 29:22-24

22Take all the fat from this male sheep. Take its fat tail, the fat around its inside parts and the best part of the liver. Take the two kidneys with the fat that is round them. Also take the top part of its right leg. (This is the sheep that makes Aaron and his sons special servants of God.)

23Take one piece of each kind of flat bread out of the basket: bread that has no oil in it, bread with oil in it and a biscuit. These are an offering to the Lord.

24Put all these things in the hands of Aaron and his sons. Then lift these things up to the Lord as an offering to him.