Bible: Num 19:11-12
Purification from Uncleanness
19:11 “‘Whoever touches 1 the corpse 2 of any person 3 will be ceremonially unclean 4 seven days. 19:12 He must purify himself 5 with water on the third day and on the seventh day, and so will be clean. But if he does not purify himself on the third day and the seventh day, then he will not be clean.