Exodus 16:21-36 NIV
Each morning everyone gathered as much as they needed, and when the sun grew hot, it melted away. On the sixth day, they gathered twice as much—two omers for each person—and the leaders of the community came and reported this to Moses. He said to them, “This is what the LORD commanded: ‘Tomorrow is to be a day of sabbath rest, a holy sabbath to the LORD. So bake what you want to bake and boil what you want to boil. Save whatever is left and keep it until morning.’ ”
So they saved it until morning, as Moses commanded, and it did not stink or get maggots in it. “Eat it today,” Moses said, “because today is a sabbath to the LORD. You will not find any of it on the ground today. Six days you are to gather it, but on the seventh day, the Sabbath, there will not be any.”
Nevertheless, some of the people went out on the seventh day to gather it, but they found none. Then the LORD said to Moses, “How long will you refuse to keep my commands and my instructions? Bear in mind that the LORD has given you the Sabbath; that is why on the sixth day he gives you bread for two days. Everyone is to stay where they are on the seventh day; no one is to go out.” So the people rested on the seventh day.
The people of Israel called the bread manna. It was white like coriander seed and tasted like wafers made with honey. Moses said, “This is what the LORD has commanded: ‘Take an omer of manna and keep it for the generations to come, so they can see the bread I gave you to eat in the wilderness when I brought you out of Egypt.’ ”
So Moses said to Aaron, “Take a jar and put an omer of manna in it. Then place it before the LORD to be kept for the generations to come.”
As the LORD commanded Moses, Aaron put the manna with the tablets of the covenant law, so that it might be preserved. The Israelites ate manna forty years, until they came to a land that was settled; they ate manna until they reached the border of Canaan.
(An omer is one-tenth of an ephah.)
NIV: New International Version