Exodus 18:20-21

20You are the person who must teach them God's laws and commands. You must show them how they should live and what they must do.

21But you must also choose some other clever men to help you. They must be honest men who respect God. They must not want to take money from people. Choose these men to be officers with authority over groups of the people. They will be leaders of 1,000 people, or 100 people, or 50 people, or 10 people.