Exodus 16:32-33

32Then Moses said, “This is 1what the Lord has commanded: ‘A 2full omer of it is to be kept safe throughout your generations, so that they may see the bread that I fed you in the wilderness, when I brought you out of the land of Egypt.’”

33And Moses said to Aaron, “3Take a jar and put a 4full omer of manna in it, and place it before the Lord to be kept safe throughout your generations.”