Exodus 16:26-36

Six days you shall gather it, but on the seventh day, the Sabbath, there will be none [in the field].” Now on the seventh day some of the people went out to gather, but they found none. Then the LORD said to Moses, “How long do you [people] refuse to keep My commandments and My instructions (laws)? See, the LORD has given you the Sabbath; therefore He gives you the bread for two days on the sixth day. Let every man stay in his place; no man is to leave his place on the seventh day.” So the people rested on the seventh day. The house of Israel called the bread manna; it was like coriander seed, white, and it tasted like flat pastry (wafers) made with honey. Then Moses said, “This is the word which the LORD commands, ‘Let an omer of it be kept throughout 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.’ ” So Moses said to Aaron, “Take a pot and put an omer of manna in it, and place it before the LORD to be kept throughout your generations.” As the LORD commanded Moses, so Aaron [eventually] placed it in the presence of the Testimony, to be kept. [Heb 9:4] The Israelites ate manna forty years, until they reached an inhabited land; they ate the manna until they came to the border of the land of Canaan. (Now an omer is the tenth of an ephah.)