Now Moses kept the flock of Jethro his father in law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of Elohim, even to Horeb.
And Moses went and returned to Jethro his father in law, and said unto him, Let me go, I pray thee, and return unto my brethren which are in Egypt, and see whether they be yet alive. And Jethro said to Moses, Go in peace.
And Moses said unto Hobab, the son of Raguel the Midianite, Moses' father in law, We are journeying unto the place of which Yahweh said, I will give it you: come thou with us, and we will do thee good: for Yahweh hath spoken good concerning Israel.
But the man that shall be unclean, and shall not purify himself, that soul shall be cut off from among the congregation, because he hath defiled the sanctuary of Yahweh: the water of separation hath not been sprinkled upon him; he is unclean.