Exodus 16:32-34

Then Moses said, “This is the thing which the LORD has commanded: ‘Fill an omer with it, to be kept for your generations, that they may see the bread with which I fed you in the wilderness, when I brought you out of the land of Egypt.’ ” And Moses said to Aaron, “Take a pot and put an omer of manna in it, and lay it up before the LORD, to be kept for your generations.” As the LORD commanded Moses, so Aaron laid it up before the Testimony, to be kept.