Exodus 16:33-36

33And Moses said to Aaron, “1Take a jar and put a 2full omer of manna in it, and place it before the Lord to be kept safe throughout your generations.”

34As the Lord commanded Moses, so Aaron placed it before 3the Testimony, to be kept.

35And 4the sons of Israel ate the manna for forty years, until they came to an inhabited land; they ate the manna until they came to the border of the land of Canaan.

36(Now 5an 6omer is a tenth of an ephah.)