Commento su Deuteronomio 1:9

ואמר אלכם בעת ההוא לאמר AND I SPAKE UNTO YOU AT THAT TIME, SAYING — What is the force of לאמר, (lit., to say. i.e. being bidden to say)? Moses, in effect, said unto them: Not of myself do I tell you that I am not able to bear you, but by the bidding of the Holy One, blessed be He (Sifrei Devarim 9:1),

AND I SPOKE UNTO YOU AT THAT TIME, SAYING: ‘I AM NOT ABLE TO BEAR YOU MYSELF ALONE.’ [Moses’ statement here in this verse was actually said] before the Eternal said to us in Horeb, Ye have dwelt long enough in this mountain,⁷¹Above, Verse 6. For, according to the opinion that Jethro came before the Giving of the Torah, the appointment of judges (recorded here in the following verses) took place almost a year before they moved away from Horeb. Hence we must say that the whole episode that begins with Verse 9 happened before Israel was commanded to journey from Horeb (Verse 6). And the expression at that time (in this verse) means “while we dwelled at Horeb.” But according to the Sages who say that Jethro came after the Giving of the Torah, the expression at that time means “at that time when we were about to leave Horeb.” according to the opinion of those who say that Jethro came before the Giving of the Torah.⁷²See Exodus 18:1; Vol. II, pp. 249-252. And the meaning of the expression at that time [in the verse before us] is “while we dwelled at Horeb.” But Moses mentioned it here [in Verse 9, rather than before Verse 6] to convey the following thought: We received the Torah, and you had judges and officers to judge you and lead you, and we were thus ready to enter the Land. And we journeyed from Horeb⁷³Further, Verse 19, and Verse 22. in our [four] divisions with our judges and our elders, and then ye came near unto me every one of you⁷³Further, Verse 19, and Verse 22. with your wise men and your leaders and you wanted spies to be sent, and thus the plan [for an immediate entry into the Land] was frustrated.

לא אוכל לבדי שאת אתכם, "I am not able to bear you myself alone." This does not mean that Moses said so in these very words; rather it means that Moses said something which was equivalent to these words.