Numbers 10:29-33

29And Moses said unto Hobab, the son of Reuel the Midianite, Moses’ father-in-law, We are journeying unto the place of which Jehovah said, I will give it you: come thou with us, and we will do thee good; for Jehovah hath spoken good concerning Israel. 30And he said unto him, I will not go; but I will depart to mine own land, and to my kindred. 31And he said, Leave us not, I pray thee; forasmuch as thou knowest how we are to encamp in the wilderness, and thou shalt be to us instead of eyes. 32And it shall be, if thou go with us, yea, it shall be, that what good soever Jehovah shall do unto us, the same will we do unto thee.

33And they set forward from the mount of Jehovah three days’ journey; and the ark of the covenant of Jehovah went before them three days’ journey, to seek out a resting-place for them.