Leviticus 7:19

And for these ye shall be unclean: whosoever toucheth the carcass of them shall be unclean until the even. And whosoever beareth ought of the carcass of them shall wash his clothes, and be unclean until the even. The carcasses of every beast which divideth the hoof, and is not cloven-footed, nor cheweth the cud, are unclean unto you: every one that toucheth them shall be unclean. And whatsoever goeth upon his paws, among all manner of beasts that go on all four, those are unclean unto you: whoso toucheth their carcass shall be unclean until the even. And he that beareth the carcass of them shall wash his clothes, and be unclean until the even: they are unclean unto you. These also shall be unclean unto you among the creeping things that creep upon the earth; the weasel, and the mouse, and the tortoise after his kind, And the ferret, and the chameleon, and the lizard, and the snail, and the mole. These are unclean to you among all that creep: whosoever doth touch them, when they be dead, shall be unclean until the even. And upon whatsoever any of them, when they are dead, doth fall, it shall be unclean; whether it be any vessel of wood, or raiment, or skin, or sack, whatsoever vessel it be, wherein any work is done, it must be put into water, and it shall be unclean until the even; so it shall be cleansed. And every earthen vessel, whereinto any of them falleth, whatsoever is in it shall be unclean; and ye shall break it. Of all meat which may be eaten, that on which such water cometh shall be unclean: and all drink that may be drunk in every such vessel shall be unclean. And every thing whereupon any part of their carcass falleth shall be unclean; whether it be oven, or ranges for pots, they shall be broken down: for they are unclean and shall be unclean unto you. Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean: but that which toucheth their carcass shall be unclean. And if any part of their carcass fall upon any sowing seed which is to be sown, it shall be clean. But if any water be put upon the seed, and any part of their carcass fall thereon, it shall be unclean unto you. And if any beast, of which ye may eat, die; he that toucheth the carcass thereof shall be unclean until the even.

He that toucheth the dead body of any man shall be unclean seven days. He shall purify himself with it on the third day, and on the seventh day he shall be clean: but if he purify not himself the third day, then the seventh day he shall not be clean. Whosoever toucheth the dead body of any man that is dead, and purifieth not himself, defileth the tabernacle of the LORD; and that soul shall be cut off from Israel: because the water of separation was not sprinkled upon him, he shall be unclean; his uncleanness is yet upon him. This is the law, when a man dieth in a tent: all that come into the tent, and all that is in the tent, shall be unclean seven days. And every open vessel, which hath no covering bound upon it, is unclean. And whosoever toucheth one that is slain with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.

But rather give alms of such things as ye have; and, behold, all things are clean unto you.

And the voice spake unto him again the second time, What God hath cleansed, that call not thou common.

I know, and am persuaded by the Lord Jesus, that there is nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him it is unclean.