Exodus 29:22-24

22“Take from this ram the fat, the fat tail, the fat on the internal organs, the long lobe of the liver, both kidneys with the fat on them, and the right thigh. (This is the ram for the ordination.)

23From the basket of bread made without yeast, which is before the Lord, take one round loaf, one thick loaf with olive oil mixed in, and one thin loaf.

24Put all these in the hands of Aaron and his sons and have them wave them before the Lord as a wave offering.