Judges 7:5-6

And when the people were come down to the waters, the Lord said to Gedeon: They that shall lap the water with their tongues, as dogs are wont to lap, thou shalt set apart by themselves. But they that shall drink bowing down their knees, shall be on the other side. And the number of them that had lapped water, casting it with the hand to their mouth, was three hundred men: and all the rest of the multitude had drunk kneeling.