Numbers 10:29-33

29And Moses said unto Hobab, the son of Raguel the Midianite, Moses’ father in law, We are journeying unto the place of which Yhwh said, I will give it you: come thou with us, and we will do thee good: for Yhwh 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 mayest be to us instead of eyes. 32And it shall be, if thou go with us, yea, it shall be, that what goodness Yhwh shall do unto us, the same will we do unto thee.

33And they departed from the mount of Yhwh three days’ journey: and the ark of the covenant of Yhwh went before them in the three days’ journey, to search out a resting place for them.