Numbers 6:4

6:4 All the days of his separation he must not eat anything that is produced by the grapevine, from seed to skin.

Numbers 19:5

19:5 Then the heifer must be burned in his sight – its skin, its flesh, its blood, and its offal is to be burned.

Numbers 31:20

31:20 You must purify each garment and everything that is made of skin, everything made of goat’s hair, and everything made of wood.”