Numbers 19:12
12 He shall purify himself with water on the third day, and on the seventh day he shall be clean; but if he doesn’t purify himself the third day, then the seventh day he shall not be clean.
12 He shall purify himself with water on the third day, and on the seventh day he shall be clean; but if he doesn’t purify himself the third day, then the seventh day he shall not be clean.