Leviticus 11:43

Ye shall not make yourselves abominable with any creeping thing that creepeth,.... With any creeping thing that flies in the air, excepting the four sorts of locusts, Leviticus 11:22 and with any creeping thing in the waters, Leviticus 11:10 or with anything that creeps on the land, by eating any of them; which being abominable for food, would make the eater of them so to God, he thereby breaking a command of his:

neither shall you make yourselves unclean with them; by touching and bearing them, as with dead beasts, so with dead flies and the like:

that ye should be defiled thereby; in a ceremonial sense.