Numbers 19:16

Overview - Numbers 19
1	The water of separation made of the ashes of a red heifer.
11	The law for the use of it in purification of the unclean.

Numbers 19:16  (King James Version)
And whosoever toucheth one that is slain with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.