'Unclean' in the Bible

And if a man shall take his brother's wife, it is an unclean thing: he hath uncovered his brother's nakedness; they shall be childless.

Ye shall therefore put difference between clean beasts and unclean, and between unclean fowls and clean: and ye shall not make your souls abominable by beast, or by fowl, or by any manner of living thing that creepeth on the ground, which I have separated from you as unclean.

The Lord said to Moses: “Speak to Aaron’s sons, the priests, and tell them: A priest is not to make himself ceremonially unclean for a dead person among his relatives,

He may make himself unclean for his young unmarried sister in his immediate family.

He is not to make himself unclean for those related to him by marriage and so defile himself.

He must not go near any dead person or make himself unclean even for his father or mother.

nor shall he go out of the sanctuary nor profane (make ceremonially unclean) the sanctuary of his God, for the consecration of the anointing oil of his God is on him; I am the Lord.

And he may not make his seed unclean among his people, for I the Lord have made him holy.

but he shall not go within the veil or approach the altar [of incense], because he has a defect, so that he will not profane My sanctuaries; for I am the Lord who sanctifies them.’”

Tell them that whoever among your descendants throughout your generations approaches the sacred things that the Israelis had consecrated to the LORD while still remaining unclean is to be eliminated from my presence. I am the LORD.

What man soever of the seed of Aaron is a leper, or hath a running issue; he shall not eat of the holy things, until he be clean. And whoso toucheth any thing that is unclean by the dead, or a man whose seed goeth from him;

Or whosoever toucheth any creeping thing, whereby he may be made unclean, or a man of whom he may take uncleanness, whatsoever uncleanness he hath;

The soul which hath touched any such shall be unclean until even, and shall not eat of the holy things, unless he wash his flesh with water.

He must not eat an animal that died naturally or was mauled by wild beasts, making himself unclean by it; I am Yahweh.

And from one who is not an Israelite you may not take any of these for an offering to the Lord; for they are unclean, there is a mark on them, and the Lord will not be pleased with them.

And if it be any unclean beast, of which they do not offer a sacrifice unto the LORD, then he shall present the beast before the priest:

And if it be of an unclean beast, then he shall redeem it according to thine estimation, and shall add a fifth part of it thereto: or if it be not redeemed, then it shall be sold according to thy estimation.