Exodus 18:7, 12-16

So Moses went out to meet his father-in-law, and he bowed down [in respect] and kissed him. They asked each other about their well-being and went into the tent.

Then Jethro, Moses’ father-in-law, took a burnt offering and [other] sacrifices [to offer] to God, and Aaron came with all the elders of Israel to eat a meal with Moses’ father-in-law before God. Now the next day Moses sat to judge [the disputes] the people [had with one another], and the people stood around Moses from dawn to dusk. When Moses’ father-in-law saw everything that he was doing for the people, he said, “What is this that you are doing for the people? Why are you sitting alone [as a judge] with all the people standing around you from dawn to dusk?” Moses said to his father-in-law, “Because the people come to me to ask [about the will] of God. When they have a dispute they come to me, and I judge between a man and his neighbor and I make known the statutes of God and His laws.”