24 And ye shall wash your clothes on the seventh day, and ye shall be clean, and afterward ye shall come into the camp.
Numbers 31:24 Cross References - Webster
Leviticus 11:25
25 And whoever beareth aught of the carcass of them shall wash his clothes, and be unclean until the evening.
Leviticus 14:9
9 But it shall be on the seventh day, that he shall shave all his hair off his head, and his beard, and his eye-brows, even all his hair he shall shave off; and he shall wash his clothes, also he shall wash his flesh in water, and he shall be clean.
Leviticus 15:13
13 And when he that hath an issue is cleansed of his issue; then he shall number to himself seven days for his cleansing, and wash his clothes, and bathe his flesh in running water, and shall 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 on the seventh day he shall purify himself, and wash his clothes, and bathe himself in water, and shall be clean at evening.