Leviticus 4:10

New International Version

just as the fat is removed from the ox sacrificed as a fellowship offering. Then the priest shall burn them on the altar of burnt offering.

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From the fellowship offering you are to bring a food offering to the Lord: the internal organs and all the fat that is connected to them,

But the hide of the bull and all its flesh, as well as the head and legs, the internal organs and the intestines—

both kidneys with the fat on them near the loins, and the long lobe of the liver, which he will remove with the kidneys—