Judges 7:4-5

7:4 The Lord spoke to Gideon again, “There are still too many men. Bring them down to the water and I will thin the ranks some more. When I say, ‘This one should go with you,’ pick him to go; when I say, ‘This one should not go with you,’ do not take him.” 7:5 So he brought the men down to the water. Then the Lord said to Gideon, “Separate those who lap the water as a dog laps from those who kneel to drink.”