24 And ye shall wash your clothes on the seventh day, and ye shall be clean, and after that may ye come into the camp.
Numbers 31:24 Cross References - Leeser
Leviticus 11:25
25 And whosoever beareth aught of their carcass shall wash his clothes, and be unclean until the evening.
Leviticus 14:9
9 And it shall be on the seventh day, that he shall shave off all his hair, his head, and his beard, and his eyebrows, even all his hair shall he shave off: and he shall wash his clothes, he shall also wash his flesh in water, when he shall be clean.
Leviticus 15:13
13 And when he that hath an issue becometh clean of his issue: then shall he number to himself seven days for his cleansing, and wash his clothes, and bathe his flesh in running water, and then shall he be clean.
Numbers 19:19
19 And the clean person shall sprinkle upon the unclean on the third day and on the seventh day; and when he hath purified him on the seventh day, then shall he wash his clothes, and bathe himself in water, and shall be clean at evening.