Judges 7:4

And the Lord said unto Gideon, The people are yet too many, and there was still danger of their vaunting themselves in case of a victory; bring them down unto the water, and I will try them, put them to a test, 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. The entire region is well watered, there being no lack of brooks.