And the Lord spake unto Moses the selfsame day,.... On which he finished the reading of the law, and the above song, which was the seventh of Adar or February; according to the Targum of Jonathan, the day he died on; according to the Egyptian Calendar (a), it was the sixteenth of that month, see Deuteronomy 34:5,
saying; as follows.
(a) Apud Ludolf. Lex. Ethiop. p. 537.

Now Moses had done his work, why should he desire to live a day longer? God reminds him of the sin of which he had been guilty, for which he was kept from entering Canaan. It is good for the best of men to die repenting the infirmities of which they are conscious. But those may die with comfort and ease, whenever God calls for them, notwithstanding the sins they remember against themselves, who have a believing prospect, and a well-grounded hope of eternal life beyond death.

Get thee up . . . and die . . . Because ye trespassed . . . at Meribah--(See on Numbers 20:13).

"That self-same day," viz., the day upon which Moses had rehearsed the song to the children of Israel, the Lord renewed the announcement of his death, by repeating the command already given to him (Numbers 27:12-14) to ascend Mount Nebo, there to survey the land of Canaan, and then to be gathered unto his people. In form, this repetition differs from the previous announcement, partly in the fact that the situation of Mount Nebo is more fully described (in the land of Moab, etc., as in Deuteronomy 1:5; Deuteronomy 29:1), and partly in the continual use of the imperative, and a few other trifling points. These differences may all be explained from the fact that the account here was not written by Moses himself.

That self - same day - Now he had finished his work, why should he desire to live a day longer? He had indeed formerly desired and prayed, that he might go over Jordan: but now he is entirely satisfied, and saith no more of that matter.