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 God, even to Horeb.
And Moses went and returned to Jethro his father in law, and said to him, Let me go, I pray you, and return to my brothers which are in Egypt, and see whether they be yet alive. And Jethro said to Moses, Go in peace.
And Moses said to Hobab, the son of Raguel the Midianite, Moses' father in law, We are journeying to the place of which the LORD said, I will give it you: come you with us, and we will do you good: for the LORD has 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 has defiled the sanctuary of the LORD: the water of separation has not been sprinkled on him; he is unclean.