Numbers 19:12-14

Young's Literal Translation

¹² he doth cleanse himself for it on the third day, and on the seventh day he is clean; and if he cleanse not himself on the third day, then on the seventh day he is not clean.

¹³ Any one who is coming against the dead, against the body of man who dieth, and cleanseth not himself -- the tabernacle of Jehovah he hath defiled, and that person hath been cut off from Israel, for water of separation is not sprinkled upon him; he is unclean; his uncleanness [is] still upon him.

¹⁴ `This [is] the law, when a man dieth in a tent: every one who is coming in unto the tent, and all that [is] in the tent, is unclean seven days;