Exodus 16:32-33

32Then Moses said, “This is 1what the Lord has commanded, ‘Let an omerful of it be kept throughout your generations, that they may see the bread that I fed you in the wilderness, when I brought you out of the land of Egypt.’”

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