Albert Barnes Commentary Leviticus 19:19

"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." — Leviticus 19:19 (ASV)

Linen and woolen - The original word is found only here and in Deuteronomy 22:11, where it is rendered of divers sorts. It may denote such tissues as linsey woolsey.