And Moses said unto Hobab, the son of Reuel the Midianite, Moses' father in law, We are journeying unto the place of which the LORD said, I will give it to you: come with us, and we will do you good: for the LORD has spoken good concerning Israel.

This is the law of the Nazarite who has vowed, and of his offering unto the LORD for his separation, beside that that his hand shall get: according to the vow which he vowed, so he must do after the law of his separation.