Exodus 18:25-27

25And Moses chose able men out of all Israel, and made them heads over the people: rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens.

26So they judged the people at all times; the hard cases they brought to Moses, but they judged every small case themselves.

27Then Moses let his father-in-law depart, and he went his way to his own land.