Leviticus 10:19

And Aaron said unto Moses, Behold, this day have they offered their sin-offering and their burnt offering before the Lord, the priests had made these offerings for themselves; and such things have befallen me, in being bereft of two of his sons; and if I had eaten the sin-offering today, should it have been accepted in the sight of the Lord? The fearful accident which had happened had made Aaron and his remaining sons incapable of and unfit for eating. Cf Hosea 9:4.

Ye shall keep My statutes, those special precepts which applied particularly to the conditions under which the Jews lived. Thou shalt not let thy cattle gender with a diverse kind, for the production of hybrids. Thou shalt not sow thy field with mingled seed, for the same reason; neither shall a garment mingled of linen and woolen come upon thee.