Numbers 31:19
And you, camp outside the camp seven days; all who killed a person and all who touched the slain purify yourselves on the third day and on the seventh day, you and your captives.
Numbers 5:2
"Command the {Israelites}: they must send everyone from the camp who is afflicted with a rash, everyone with a fluid discharge, and everyone unclean through [contact with] a corpse.
Numbers 19:11-22
" 'The one who touches a corpse of {any person} will be unclean for seven days.
1 Chronicles 22:8
but it happened [that] the word of Yahweh [came] over me, saying, 'You have shed much blood and have made much war; you shall not build a house for my name because you have shed much blood upon the ground before me.