'Unclean' in the Bible

“Command the sons of Israel that they send away from the camp every leper and everyone having a discharge and everyone who is unclean because of a dead person.

He shall not make himself unclean for his father or for his mother, for his brother or for his sister, when they die, because his separation to God is on his head.

But there were some men who were unclean because of the dead person, so that they could not observe Passover on that day; so they came before Moses and Aaron on that day.

Those men said to him, “Though we are unclean because of the dead person, why are we restrained from presenting the offering of the Lord at its appointed time among the sons of Israel?”

“Speak to the sons of Israel, saying, ‘If any one of you or of your generations becomes unclean because of a dead person, or is on a distant journey, he may, however, observe the Passover to the Lord.

Every first issue of the womb of all flesh, whether man or animal, which they offer to the Lord, shall be yours; nevertheless the firstborn of man you shall surely redeem, and the firstborn of unclean animals you shall redeem.

The priest shall then wash his clothes and bathe his body in water, and afterward come into the camp, but the priest shall be unclean until evening.

The one who burns it shall also wash his clothes in water and bathe his body in water, and shall be unclean until evening.

The one who gathers the ashes of the heifer shall wash his clothes and be unclean until evening; and it shall be a perpetual statute to the sons of Israel and to the alien who sojourns among them.

‘The one who touches the corpse of any person shall be unclean for seven days.

Anyone who touches a corpse, the body of a man who has died, and does not purify himself, defiles the tabernacle of the Lord; and that person shall be cut off from Israel. Because the water for impurity was not sprinkled on him, he shall be unclean; his uncleanness is still on him.

‘This is the law when a man dies in a tent: everyone who comes into the tent and everyone who is in the tent shall be unclean for seven days.

Every open vessel, which has no covering tied down on it, shall be unclean.

Also, anyone who in the open field touches one who has been slain with a sword or who has died naturally, or a human bone or a grave, shall be unclean for seven days.

Then for the unclean person they shall take some of the ashes of the burnt purification from sin and flowing water shall be added to them in a vessel.

Then the clean person shall sprinkle on the unclean on the third day and on the seventh day; and on the seventh day he shall purify him from uncleanness, and he shall wash his clothes and bathe himself in water and shall be clean by evening.

‘But the man who is unclean and does not purify himself from uncleanness, that person shall be cut off from the midst of the assembly, because he has defiled the sanctuary of the Lord; the water for impurity has not been sprinkled on him, he is unclean.

So it shall be a perpetual statute for them. And he who sprinkles the water for impurity shall wash his clothes, and he who touches the water for impurity shall be unclean until evening.

Furthermore, anything that the unclean person touches shall be unclean; and the person who touches it shall be unclean until evening.’”