Exodus 16:3-4

The Israelites said to them, “If only we had died at the LORD’s hand in the land of Egypt, as we sat by our kettles of meat and ate our fill of bread! But you have led us into this wilderness to make this whole assembly die of famine!” The Quail and the Manna. Then the LORD said to Moses: I am going to rain down bread from heaven for you. Each day the people are to go out and gather their daily portion; thus will I test them, to see whether they follow my instructions or not.