Exodus 16:30

28 Then the LORD said to Moses, “How long will you refuse to keep My commandments and instructions?

29 Understand that the LORD has given you the Sabbath; that is why on the sixth day He will give you bread for two days. On the seventh day, everyone must stay where he is; no one may leave his place.”

30 So the people rested on the seventh day.

31 Now the house of Israel called the bread manna. It was white like coriander seed and tasted like wafers made with honey.

32 Moses said, “This is what the LORD has commanded: ‘Keep an omer of manna for the generations to come, so that they may see the bread I fed you in the wilderness when I brought you out of the land of Egypt.’”