Numbers 31:17-19

New Century Version

¹⁷ Kill all the Midianite boys, and kill all the Midianite women who have had sexual relations. ¹⁸ But save for yourselves the girls who have not had sexual relations with a man.

¹⁹ “All you men who killed anyone or touched a dead body must stay outside the camp for seven days. On the third and seventh days you and your captives must make yourselves clean.