John Gill's Bible Commentary Ver. 9. And I spake unto you at that time , etc.] About that time; for it was after the rock in Horeb was smitten, and before they encamped at Mount Sinai, that Jethro gave the advice which Moses took, and proceeded on it, as here related; (see Exodus 18:1-27) saying, I am not able to bear you myself alone ; to rule and govern them, judge and determine matters between them. Jethro suggested this to Moses, and he took the hint, and was conscious to himself that it was too much for him, and so declared it to the people, though it is not before recorded; (see Exodus 18:18).
Matthew Henry Commentary
Verses 9-18 - Moses reminds the people of the happy constitution of their government which might make them all safe and easy, if it was not their own fault He owns the fulfilment of God's promise to Abraham, and prays for the further accomplishment of it. We are not straitened in the power an goodness of God; why should we be straitened in our own faith and hope Good laws were given to the Israelites, and good men were to see to the execution of them, which showed God's goodness to them, and the care of Moses.
Original Hebrew ואמר559 אלכם413 בעת6256 ההוא1931 לאמר559 לא3808 אוכל3201 לבדי905 שׂאת5375 אתכם׃853