'Stuff' in the Bible

whether in woven or knitted material or in the warp (lengthwise strands) or woof (crosswise strands) of linen or of wool, or in a skin or on anything made of leather,

The garment, whether the warp or the woof, or anything made of leather from which the mildew has departed after washing, shall then be washed a second time and it will be [ceremonially] clean.”

Ye shall keep my statutes. Thou shalt not let thy cattle gender with a diverse kind: thou shalt not sow thy field with two kinds of seed: neither shall there come upon thee a garment of two kinds of stuff mingled together.