Numbers 31:19
"Any of you who has killed anyone or touched any of the dead, remain outside the camp for seven days; purify yourselves and your captives on the third day, and on the seventh day.
Numbers 5:2
"Command the Israelites to expel from the camp every leper, everyone who has a discharge, and whoever becomes defiled by a corpse.
Numbers 19:11-22
"'Whoever touches the corpse of any person will be ceremonially unclean seven days.
1 Chronicles 22:8
But the Lord said to me: 'You have spilled a great deal of blood and fought many battles. You must not build a temple to honor me, for you have spilled a great deal of blood on the ground before me.