Leviticus 19:19
You shall keep my statutes. You shall not let your cattle engender with a diverse kind: you shall not sow your field with mingled seed: neither shall a garment mingled of linen and woolen come on you.
Nave's Topical Index—AKJV

Deuteronomy 22:11
You shall not wear a garment of divers sorts, as of woolen and linen together.
Nave's Topical Index—AKJV