Judges 7:5

So Gideon brought the men down to the water, and the LORD said to him, “Separate those who lap the water with their tongues like a dog from those who kneel to drink.”

So he brought down the people unto the water: and the LORD said unto Gideon, Every one that lappeth of the water with his tongue, as a dog lappeth, him shalt thou set by himself; likewise every one that boweth down upon his knees to drink.