Charles Ellicott Commentary Exodus 16:32-35

"And Moses said, This is the thing which Jehovah hath commanded, Let an omerful of it be kept throughout your generations, that they may see the bread wherewith I fed you in the wilderness, when I brought you forth from the land of Egypt. And Moses said unto Aaron, Take a pot, and put an omerful of manna therein, and lay it up before Jehovah, to be kept throughout your generations. As Jehovah commanded Moses, so Aaron laid it up before the Testimony, to be kept. And the children of Israel did eat the manna forty years, until they came to a land inhabited; they did eat the manna, until they came unto the borders of the land of Canaan." — Exodus 16:32-35 (ASV)

And Moses said ... Fill an omer. —This narrative, which must belong to a later date than any other part of Exodus, since it assumes that the Tabernacle is set up (Exodus 16:34), seems to have been placed here because of its subject matter.

The writer wishes to conclude the history of the manna and has two further points to note concerning it:

1. The preservation of an omer of it as a perpetual memorial (Exodus 16:32–34).
2. The fact of its continuance until the Israelites reached the borders of Canaan.

The passage is probably an addition to the original “Book,” but contains nothing that may not have been written by Moses.