Exodus 18:24-27

Moses listened to his father-in-law and did everything he said. He chose capable men from all Israel and made them leaders of the people, officials over thousands, hundreds, fifties and tens. They served as judges for the people at all times. The difficult cases they brought to Moses, but the simple ones they decided themselves. Then Moses sent his father-in-law on his way, and Jethro returned to his own country.