Exodus 29:13, 22

Take all the fat around the internal organs, the long lobe of the liver, and the two kidneys and the fat around them, and burn it all on the altar.

“Since this is the ram for the ordination of Aaron and his sons, take the fat of the ram, including the fat of the broad tail, the fat around the internal organs, the long lobe of the liver, and the two kidneys and the fat around them, along with the right thigh.