4Then the LORD said to Moses, “Behold, I will rain down bread from heaven for you. Each day the people are to go out and gather enough for that day. In this way I will test whether or not they will follow My instructions.
5Then on the sixth day, when they prepare what they bring in, it will be twice as much as they gather on the other days.”
6So Moses and Aaron said to all the Israelites, “This evening you will know that it was the LORD who brought you out of the land of Egypt,
— Exodus 16:4-6