Exodus 16:36

Moses said to Aaron, “Take a pot, and put an omer-full of manna in it, and lay it up before the LORD, to be kept throughout your generations.”

As the LORD commanded Moses, so Aaron laid it up before the Testimony, to be kept.

The children of Israel ate the manna forty years, until they came to an inhabited land. They ate the manna until they came to the borders of the land of Canaan.