Exodus 18:15, 19, 26

And Moses said to his father-in-law, “Because the people come to me to inquire of God.

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.