Numbers 10:29-32

29And Moses said to Hobab, the son of Reuel the Midianite, Moses' father-in-law, We are journeying to the place of which Jehovah said, I will give it unto you: come with us, and we will do thee good; for Jehovah has spoken good concerning Israel.

30And he said to him, I will not go; but to mine own land, and to my kindred will I go.

31And he said, Leave me not, I pray thee, because thou knowest where we are to encamp in the wilderness, and thou wilt be to us for eyes.

32And it shall be, if thou come with us, that whatever good Jehovah doeth unto us, so will we do to thee.