The people of Israel ate the manna forty years, till they came to a habitable land. They ate the manna till they came to the border of the land of Canaan.
God having provided manna to be his people's food in the wilderness, and to be to them a continual feast, we are here told, 1. How the memory of it was preserved. An omer of this manna was laid up in a golden pot, as we are told (Heb 9:4), and kept before the testimony, or the ark, when it was afterwards made, Exo 16:32-34.
Commenting on Exodus 16:32-36
The children of Israel did eat manna forty years - From this verse it has been supposed that the book of Exodus was not written till after the miracle of the manna had ceased. But these words might have been added by Ezra, who under the direction of the Divine Spirit collected and digested the different inspired books, adding such supplementary, explanatory, and connecting sentences...
Exo 16:32-35 As a constant memorial of this bread of God for succeeding generations, Jehovah commanded Moses to keep a bowl full (העמר מלא, the filling of a bowl) of the manna. Accordingly Aaron placed a jar of manna (as it is stated in Exo 16:34, Exo 16:35, by way of anticipation, for the purpose of summing up everything of importance relating to the manna)...
Commenting on Exodus 16:32-35