Judges 7:10-12

But if you are afraid to go down, go with Purah your servant down to the camp, and you will hear what they say; and afterward your hands will be strengthened that you may go down against the camp.” So he went with Purah his servant down to the outposts of the army that was in the camp. Now the Midianites and the Amalekites and all the sons of the east were lying in the valley as numerous as locusts; and their camels were without number, as numerous as the sand on the seashore.