Exodus 16:2-7, 32-33

Then the whole Israelite community grumbled to Moses and Aaron in the desert. They said to them, “It would have been better if the LORD had killed us in the land of Egypt. There we had meat to eat and all the food we wanted. But you have brought us into this desert to starve us to death.” Then the LORD said to Moses, “I will cause food to fall like rain from the sky for all of you. Every day the people must go out and gather what they need for that day. I want to see if the people will do what I teach them. On the sixth day of each week, they are to gather twice as much as they gather on other days. Then they are to prepare it.” So Moses and Aaron said to all the Israelites: “This evening you will know that the LORD is the one who brought you out of Egypt. Tomorrow morning you will see the glory of the LORD, because he has heard you grumble against him. We are nothing, so you are not grumbling against us, but against the LORD.”

Then Moses said, “The LORD said, ‘Save two quarts of this food for your descendants. Then they can see the food I gave you to eat in the desert when I brought you out of Egypt.’ ” Moses told Aaron, “Take a jar and fill it with two quarts of manna. Then place it before the LORD, and save it for your descendants.”