The children of Israel did eat manna forty years— A round number is here, as usual, applied for one which is imperfect. It appears, from Judges 5:11-12 that it was short of forty years by about a month. The manna fell from Friday the fifth of June, in the year of the world 2513, to the second day of the passover, which was on Wednesday the fifth of May, in the year of the world 2553, before Jesus Christ 1447 years, and before the vulgar AEra, 1451 years. Some have supposed, that as Moses lived not to the end of these forty years, these words were added by Ezra; but, as he conducted the Israelites to the frontiers of Canaan, what inconvenience is there in supposing that he inserted these words a little before his death in this place, being in their proper and natural order.
Related Commentaries of Exodus 16:35
Exodus 16:35
35 And the children of Israel did eat manna forty years, until they came to a land inhabited; they did eat manna, until they came unto the borders of the land of Canaan.