TSK · Numbers 31:20

Then Jacob said unto his household, and to all that were with him, Put away the foreign gods that are among you, and purify yourselves, and change your garments:

This is the law when a man dieth in a tent: every one that cometh into the tent, and every one that is in the tent, shall be unclean seven days.

And whatsoever the unclean person toucheth shall be unclean; and the soul that toucheth it shall be unclean until even.