Leviticus 4:9
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
Parallel
Leviticus 3:4 uses identical wording for the kidneys and caul in the peace offering.
Leviticus 8:16
Parallel
Leviticus 8:16 again includes the same kidney and caul parts in Moses' actions.
Leviticus 3:3
Parallel
Leviticus 3:3 describes the fat covering the inwards for peace offerings, a similar procedure.