Anyone touching a dead body will be unclean for seven days: On the third day and on the seventh day he is to make himself clean with the water, and so he will be clean: but if he does not do this on the third day and on the seventh day, he will not be clean. Anyone touching the body of a dead man without making himself clean in this way, makes the House of the Lord unclean; and that man will be cut off from Israel: because the water was not put on him, he will be unclean; his unclean condition is unchanged. read more.
This is the law when death comes to a man in his tent: everyone who comes into the tent, and everyone who is in the tent, will be unclean for seven days. And every open vessel without a cover fixed on it will be unclean. And anyone touching one who has been put to death with the sword in the open country, or the body of one who has come to his end by a natural death, or a man's bone, or the resting-place of a dead body, will be unclean for seven days. And for the unclean, they are to take the dust of the burning of the sin-offering, and put flowing water on it in a vessel: And a clean person is to take hyssop and put it in the water, shaking it over the tent, and all the vessels, and the people who were there, and over him by whom the bone, or the body of one who has been put to death with the sword, or the body of one who has come to his end by a natural death, or the resting-place was touched. Let the clean person do this to the unclean on the third day and on the seventh day: and on the seventh day he is to make him clean; and after washing his clothing and bathing himself in water, he will be clean in the evening. But the man who, being unclean, does not make himself clean in this way, will be cut off from the meeting of the people, because he has made the holy place of the Lord unclean: the water has not been put on him, he is unclean. This is to be a law for them for ever: he who puts the water on the unclean person is to have his clothing washed; and anyone touching the water will be unclean till evening. Anything touched by the unclean person will be unclean; and any person touching it will be unclean till evening.

You yourselves will have to keep outside the tent-circle for seven days, anyone of you who has put any person to death or come near a dead body; and on the third day and on the seventh day make yourselves and your prisoners clean. And every bit of clothing, and anything made of leather or goats' hair or wood, you are to make clean.