Exodus 17:9

17:9 So Moses said to Joshua, “Choose some of our men and go out, fight against Amalek. Tomorrow I will stand on top of the hill with the staff of God in my hand.”

Exodus 18:21

18:21 But you choose from the people capable men, God-fearing, men of truth, those who hate bribes, and put them over the people as rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens.