Seven days; according to the law, Leviticus 15:13 Numbers 19:11,12. Purify with the water of sprinkling, Numbers 19:9.
Related Commentaries of Numbers 31:19
Numbers 31:19
19 And do ye abide without the camp seven days: whosoever hath killed any person, and whosoever hath touched any slain, purify both yourselves and your captives on the third day, and on the seventh day.