Judges 7:4–8

4And Jehovah said unto Gideon, The people are yet too many; bring them down unto the water, and I will try them for thee there: and it shall be, that of whom I say unto thee, This shall go with thee, the same shall go with thee; and of whomsoever I say unto thee, This shall not go with thee, the same shall not go. 5So he brought down the people unto the water: and Jehovah 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. 6And the number of them that lapped, putting their hand to their mouth, was three hundred men: but all the rest of the people bowed down upon their knees to drink water. 7And Jehovah said unto Gideon, By the three hundred men that lapped will I save you, and deliver the Midianites into thy hand; and let all the people go every man unto his place. 8So the people took victuals in their hand, and their trumpets; and he sent all the men of Israel every man unto his tent, but retained the three hundred men: and the camp of Midian was beneath him in the valley.