Leviticus 3:10

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 gives identical instructions for taking kidneys and fat—a direct mirror of the same ritual step.

Exodus 29:13 uses nearly identical language for burning fat in the ordination ritual—showing continuity in sacrificial law.