Moses was a hundred and twenty years old when he died: his eye was not dim, neither were his teeth moved.

And Moses is a son of a hundred and twenty years when he dieth; his eye hath not become dim, nor hath his moisture fled.

And Moses at his death was a hundred and twenty years old: his eye had not become clouded, or his natural force become feeble.

Moses was one hundred twenty years old when he died: his eye was not dim, nor his natural vigor diminished.

Moses was one hundred and twenty years old when he died. His eye was not dimmed, nor were his teeth displaced.

Moses autem natus erat centum et viginti annos quando mortuus est: non caligavit oculus ejus, neque aufugit vigor ejus.

And Moses was an hundred and twenty years old. Again he celebrates a special favor of God, viz., that all the senses of Moses remained unimpaired to extreme old age, in order that he might be fit for the performance of his duties: for thus it was manifested how dear to God was the welfare of the people, for which He so carefully provided. Some, indeed, though very few, are found, who are capable of public government, even to their hundredth year. Already, however, at that period, the rigor of the whole human race had so diminished that, after their seventieth year, they dragged on their life in "labor and sorrow," as Moses himself bears witness. (Psalm 90:10.) It was, consequently a conspicuous sign of the paternal favour wherewith God regarded His people, that Moses should have been thus unusually preserved in rigor and strength. If the powers of Moses had failed him long before their entrance of the promised land, his debility would have been very inconvenient to the people: yet naturally he would not have been so long sufficient for the performance of his onerous duties. It follows, then, that when God did not suffer him to fail, He showed wonderful consideration for the people's welfare. Mention is specially made of his eyes, by synecdoche, yet the sum of the matter is this, that he was neither imbecile nor feeble, for neither were the faculties of his mind exhausted, nor his body dried up. It needs not that I expound at any length, what is added respecting the solemn mourning, because I have elsewhere shown, [1] that the ancients were particular in their attention to the performance of funeral rites, on account of their faith not being as yet so elevated from the measure of revelation they had received, as to be easily able to forego those external aids to it, for which there is not the same necessity under the Gospel. It is natural to man to mourn for the dead; and, besides, this mourning was justly instituted in consequence of the loss which the Church had sustained; but a ceremony is here recorded, which was brought to an end with the fulfillment of the shadows of the Law. Our dead are, therefore, now to be buried in such a manner as that our grief may be restrained by the hope of resurrection so clearly revealed by the coming of Christ.

Footnotes

1 - See on Leviticus 21:1, [52]vol. 2 p. 228.

His eye was not dim - Even at the advanced age of a hundred and twenty; nor his natural force abated - he was a young man even in old age, notwithstanding the unparalleled hardships he had gone through. See the account of his life at the end of this chapter, Deuteronomy 34:10 (note).

And Moses was an hundred and twenty years old when he died,.... Which age of his may be divided into three equal periods, forty years in Pharaoh's court, forty years in Midian, and forty in the care and government of Israel, in Egypt and in the wilderness; so long he lived, though the common age of man in his time was but threescore years and ten, Psalm 90:10; and what is most extraordinary is:
his eyes were not dim; as Isaac's were, and men at such an age, and under, generally be:
nor his natural force abated; neither the rigour of his mind nor the strength of his body; his intellectuals were not decayed, his memory and judgment; nor was his body feeble, and his countenance aged; his "moisture" was not "fled" (m), as it may be rendered, his radical moisture; he did not look withered and wrinkled, but plump and sleek, as if he was a young man in the prime of his days: this may denote the continued use of the ceremonial law then to direct to Christ, and the force of the moral law as in the hands of Christ, requiring obedience and conformity to it, as a rule of walk and conversation, 1-Corinthians 9:21.
(m) So Ainsworth.

Though he died at the age of one hundred and twenty (see at Deuteronomy 31:2), Moses' eyes had not become dim, and his freshness had not abated (לח ב̔́נ. כוד., connected with לח in Genesis 30:37, signifies freshness). Thus had the Lord preserved the full vital energy of His servant, even till the time of his death. The mourning of the people lasted thirty days, as in the case of Aaron (Numbers 20:29).

His eye was not dim - By a miraculous work of God in mercy to his church and people.