Exodus 18:13, 16, 19, 26

And so it was, on the next day, that Moses sat to judge the people; and the people stood before Moses from morning until evening.

When they have a difficulty, they come to me, and I judge between one and another; and I make known the statutes of God and His laws.”

Listen now to my voice; I will give you counsel, and God will be with you: Stand before God for the people, so that you may bring the difficulties to God.

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