Numbers 10:30

27 And at the head of the army of the children of Naphtali was Ahira, the son of Enan.

28 This was the order in which the children of Israel were journeying by armies; so they went forward.

29 Then Moses said to Hobab, the son of his father-in-law Reuel the Midianite, We are journeying to that place of which the Lord has said, I will give it to you: so come with us, and it will be for your profit: for the Lord has good things in store for Israel.

30 But he said, I will not go with you, I will go back to the land of my birth and to my relations.

31 And he said, Do not go from us; for you will be eyes for us, guiding us to the right places in the waste land to put up our tents.

32 And if you come with us, we will give you a part in whatever good the Lord does for us.

33 So they went forward three days' journey from the mountain of the Lord; and the ark of the Lord's agreement went three days' journey before them, looking for a resting-place for them;