Leviticus 3:14
And he shall offer thereof his offering, even an offering made by fire unto the Lord; the fat that covereth the inwards, and all the fat that is upon the inwards,
Cross-references
Leviticus 3:9-11 gives similar fat offering instructions for lambs; verse 14 applies to cattle.
Leviticus 3:16 concludes the peace offering instructions, declaring all fat is the Lord's — directly continuing from the fat offering described here.
Leviticus 4:8 uses identical language for taking fat off a sin offering — a parallel ritual for a different sacrifice type.
Leviticus 4:31 explicitly says to remove fat from the sin offering 'just as from the peace offering', directly citing this procedure.
Leviticus 7:30 says the worshipper brings the fat with the breast for a wave offering, showing how the fat is presented.
Leviticus 9:20 describes Aaron placing the fat on the breasts and burning it, fulfilling the peace offering instruction.
Exodus 29:13 gives the same instruction for burning fat in priestly consecration — identical ritual language.