Even though God spoke directly to Moses, he needed some good advice about delegating from his father-in-law. When someone offers wise advice, listen carefully. Often, even Godly people do not know how to run their own lives.

Exodus 18:14-18
So when Moses’ father-in-law saw all that he did for the people, he said, “What is this thing that you are doing for the people? Why do you alone sit, and all the people stand before you from morning until evening?”
And Moses said to his father-in-law, “Because the people come to me to inquire of God.
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.”
So Moses’ father-in-law said to him, “The thing that you do is not good.

Both you and these people who are with you will surely wear yourselves out. For this thing is too much for you; you are not able to perform it by yourself.
Bible Gateway link: Exodus 18:14-18 (NKJV)