7 Bible Verses about Contamination

"'Or if anyone touches any unclean thing, whether it is the carcass of an unclean animal, or the carcass of unclean livestock, or the carcass of unclean creeping things, and it is hidden from him, and he is unclean, then he shall be guilty.

"'Whoever he who has the discharge touches, without having rinsed his hands in water, he shall wash his clothes, and bathe himself in water, and be unclean until the evening.

Whoever touches a dead person, the body of a man who has died, and doesn't purify himself, defiles the tabernacle of Yahweh; and that soul shall be cut off from Israel: because the water for impurity was not sprinkled on him, he shall be unclean; his uncleanness is yet on him.

Depart, depart, go out from there, touch no unclean thing! Go out of the midst of her! Cleanse yourselves, you who bear the vessels of Yahweh.

Yahweh spoke to Moses and to Aaron, saying, "When you have come into the land of Canaan, which I give to you for a possession, and I put a spreading mildew in a house in the land of your possession, then he who owns the house shall come and tell the priest, saying, 'There seems to me to be some sort of plague in the house.'read more.
The priest shall command that they empty the house, before the priest goes in to examine the plague, that all that is in the house not be made unclean: and afterward the priest shall go in to inspect the house. He shall examine the plague; and behold, if the plague is in the walls of the house with hollow streaks, greenish or reddish, and it appears to be deeper than the wall; then the priest shall go out of the house to the door of the house, and shut up the house seven days. The priest shall come again on the seventh day, and look. If the plague has spread in the walls of the house, then the priest shall command that they take out the stones in which is the plague, and cast them into an unclean place outside of the city: and he shall cause the inside of the house to be scraped all over, and they shall pour out the mortar, that they scraped off, outside of the city into an unclean place. They shall take other stones, and put them in the place of those stones; and he shall take other mortar, and shall plaster the house. "If the plague comes again, and breaks out in the house, after he has taken out the stones, and after he has scraped the house, and after it was plastered; then the priest shall come in and look; and behold, if the plague has spread in the house, it is a destructive mildew in the house. It is unclean. He shall break down the house, its stones, and its timber, and all the house's mortar. He shall carry them out of the city into an unclean place. "Moreover he who goes into the house while it is shut up shall be unclean until the evening. He who lies down in the house shall wash his clothes; and he who eats in the house shall wash his clothes.

Yahweh spoke to Moses, saying, "Command the children of Israel that they put out of the camp every leper, and everyone who has an issue, and whoever is unclean by the dead. Both you shall put male and female outside of the camp; that they not defile their camp, in the midst of which I dwell."read more.
The children of Israel did so, and put them out outside of the camp; as Yahweh spoke to Moses, so did the children of Israel.

but that we write to them that they abstain from the pollution of idols, from sexual immorality, from what is strangled, and from blood.