Judges 7:5-6

So he brought down the people to the water; and the LORD said to Gideon, “Everyone who laps of the water with his tongue, like a dog laps, you shall set him by himself; likewise everyone who bows down on his knees to drink.” The number of those who lapped, putting their hand to their mouth, was three hundred men; but all the rest of the people bowed down on their knees to drink water.