Leviticus 3:15

And the two kidneys, and the fat that is upon them, which is by the flanks, and the caul above the liver, with the kidneys, it shall he take away.

Cross-reference

Leviticus 3:4 lists the same parts (kidneys, fat, liver) for the peace offering from the herd, parallel to the flock instructions here.

Leviticus 3:16 continues by instructing the priest to burn these parts on the altar, concluding the offering process.

Leviticus 7:3 repeats the same list of fat parts to be offered from the peace offering, reinforcing the procedure.

2 Chronicles 29:35 Historical context

2 Chronicles 29:35 notes that during Hezekiah's restoration, the fat of peace offerings was offered, showing later obedience.