Judges 7:8-12

So the people took provisions in their hands, and their trumpets. And he sent all the rest of Israel every man to his tent, but retained the 300 men. And the camp of Midian was below him in the valley. That same night the LORD said to him, “Arise, go down against the camp, for I have given it into your hand. But if you are afraid to go down, go down to the camp with Purah your servant. And you shall hear what they say, and afterward your hands shall be strengthened to go down against the camp.” Then he went down with Purah his servant to the outposts of the armed men who were in the camp. And the Midianites and the Amalekites and all the people of the East lay along the valley like locusts in abundance, and their camels were without number, as the sand that is on the seashore in abundance.