Judges 7:5-6

5And he brought down the people to the water; and Jehovah said to 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 on his knees to drink.

6And the number of them that lapped, with their hand to their mouth, were three hundred men; and all the rest of the people bowed down on their knees to drink water.