:
1 When Jethro, the priest of Midian, Moses' father in law, heard of all that God had done for Moses, and for Israel his people, and that the LORD had brought Israel out of Egypt; 2 Then Jethro, Moses' father in law, took Zipporah, Moses' wife, after he had sent her back, 3 And her two sons; of which the name of the one was Gershom; for he said, I have been an alien in a strange land: 4 And the name of the other was Eliezer; for the God of my father, said he, was mine help, and delivered me from the sword of Pharaoh: 5 And Jethro, Moses' father in law, came with his sons and his wife unto Moses into the wilderness, where he encamped at the mount of God: 6 And he said unto Moses, I thy father in law Jethro am come unto thee, and thy wife, and her two sons with her. 7 And Moses went out to meet his father in law, and did obeisance, and kissed him; and they asked each other of their welfare; and they came into the tent. 8 And Moses told his father in law all that the LORD had done unto Pharaoh and to the Egyptians for Israel's sake, and all the travail that had come upon them by the way, and how the LORD delivered them. 9 And Jethro rejoiced for all the goodness which the LORD had done to Israel, whom he had delivered out of the hand of the Egyptians. 10 And Jethro said, Blessed be the LORD, who hath delivered you out of the hand of the Egyptians, and out of the hand of Pharaoh, who hath delivered the people from under the hand of the Egyptians. 11 Now I know that the LORD is greater than all gods: for in the thing wherein they dealt proudly he was above them. 12 And Jethro, Moses' father in law, took a burnt offering and sacrifices for God: and Aaron came, and all the elders of Israel, to eat bread with Moses' father in law before God. 13 And it came to pass on the morrow, that Moses sat to judge the people: and the people stood by Moses from the morning unto the evening. 14 And when Moses' father in law saw all that he did to the people, he said, What is this thing that thou doest to the people? why sittest thou thyself alone, and all the people stand by thee from morning unto even? 15 And Moses said unto his father in law, Because the people come unto me to inquire of God: 16 When they have a matter, they come unto me; and I judge between one and another, and I do make them know the statutes of God, and his laws. 17 And Moses' father in law said unto him, The thing that thou doest is not good. 18 Thou wilt surely wear away, both thou, and this people that is with thee: for this thing is too heavy for thee; thou art not able to perform it thyself alone. 19 Hearken now unto my voice, I will give thee counsel, and God shall be with thee: Be thou for the people to Godward, that thou mayest bring the causes unto God: 20 And thou shalt teach them ordinances and laws, and shalt shew them the way wherein they must walk, and the work that they must do. 21 Moreover thou shalt provide out of all the people able men, such as fear God, men of truth, hating covetousness; and place such over them, to be rulers of thousands, and rulers of hundreds, rulers of fifties, and rulers of tens: 22 And let them judge the people at all seasons: and it shall be, that every great matter they shall bring unto thee, but every small matter they shall judge: so shall it be easier for thyself, and they shall bear the burden with thee. 23 If thou shalt do this thing, and God command thee so, then thou shalt be able to endure, and all this people shall also go to their place in peace. 24 So Moses hearkened to the voice of his father in law, and did all that he had said. 25 And Moses chose able men out of all Israel, and made them heads over the people, rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens. 26 And they judged the people at all seasons: the hard causes they brought unto Moses, but every small matter they judged themselves. 27 And Moses let his father in law depart; and he went his way into his own land.
[AD 430] Augustine of Hippo on Exodus 18:19
God spoke to Moses, did he not? Yet Moses very prudently and humbly yielded to the advice of his father-in-law, foreigner though he was, with regard to governing and directing such a mighty nation. For he realized that from whatever intellect right counsel proceeded, it should be attributed not to him who conceived it but to the One who is the Truth, the immutable God.

[AD 430] Augustine of Hippo on Exodus 18:21
Moses in fact took care to appoint teachers of reading and writing for God’s people before they had any written record of God’s law. The Septuagint Scripture calls these instructors grammatoeisagogoı́, which is Greek for “bringers-in of letters,” because they brought them, in a sense, into their students’ minds or perhaps introduced their students to them.

[AD 604] Gregory the Dialogist on Exodus 18:21
Moses, who speaks with God, is judged by the reproof of Jethro, a man of alien race, on the ground that he devotes himself by his ill-advised labor to the earthly affairs of the people. At the same time counsel is given him to appoint others in his place for the reconciling of quarrels, so that he himself may be more free to learn the secrets of spiritual matters for teaching the people.

[AD 407] John Chrysostom on Exodus 18:24
For nothing was ever more humble than he, who, being leader of so great a people, and having overwhelmed in the sea the king and the host of all the Egyptians, as if they had been flies, and having wrought so many wonders both in Egypt and by the Red Sea and in the wilderness, and received such high testimony, yet felt exactly as if he had been an ordinary person. As a son-in-law he was humbler than his father-in-law; Moses took advice from him and was not indignant. Nor did he say, “What is this? After such and so great achievements, have you come to us with your counsel?”