Numbers 10:32-34

³²And it shall be, if thou go with us, yea, it shall be, that the same goodness which the Lord may do unto us, will we do unto thee.

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

³⁴And the cloud of the Lord was over them by day, when they set forward from the camp.