And I spoke unto you at that time. He does not here say that the counsel was suggested to him from another quarter, as to the appointment of the judges; but, perhaps, he dared not mention any name to these proud and perverse people, lest they should reject the thing which was otherwise good, from dislike of its author, as a foreigner. No doubt he is here recounting what had before happened; therefore he confesses himself, from his own personal feelings, unequal to bearing the burden, if he alone is set over the whole people. He adduces as the cause the immense multitude amongst whom there must necessarily arise many strifes and controversies. As to what he says of their increase, the commencement of its period must not be taken from the Exodus, but he commemorates the extraordinary and incredible favor of God, because they had so largely multiplied under the cruel tyranny when they were doomed to total destruction; and he adds a prayer, that for the future also the same blessing may attend them. Yet in these words he reminds them that the burden of government would become daily more arduous and weighty; whereby he may more readily persuade them to provide at once for what could not be eventually avoided.

This appointment of the "captains" (compare Exodus 18:21 ff) must not be confounded with that of the elders in Numbers 11:16 ff. The former would number 78,600; the latter were 70 only.
A comparison between this passage and that in Exodus makes it obvious that Moses is only touching on certain parts of the whole history, without regard to order of time, but with a special purpose. This important arrangement for the good government of the people took place before they left Horeb to march direct to the promised land. This fact sets more clearly before us the perverseness and ingratitude of the people, to which the orator next passes; and shows, what he was anxious to impress, that the fault of the 40 years' delay rested only with themselves!

And I spake (g) unto you at that time, saying, I am not able to bear you myself alone:
(g) By the counsel of Jethro my father-in-law, (Exodus 18:19).

And I spake unto you at that time,.... 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.
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.

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 and 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.

I spake unto you at that time, saying, I am not able to bear you myself alone--a little before their arrival in Horeb. Moses addresses that new generation as the representatives of their fathers, in whose sight and hearing all the transactions he recounts took place. A reference is here made to the suggestion of Jethro (Exodus 18:18). In noticing his practical adoption of a plan by which the administration of justice was committed to a select number of subordinate officers, Moses, by a beautiful allusion to the patriarchal blessing, ascribed the necessity of that memorable change in the government to the vast increase of the population.

At that time - That is, about that time, namely, a little before their coming to Horeb.