Exodus 16:15

What is this? Manna descended from the clouds. It came down in dew melted, and yet was itself of such a consistency as to serve for nourishing strengthening food, without any thing else: It was pleasant food; the Jews say it was palatable to all, according as their tastes were. It was wholesome food, light of digestion. By this spare and plain diet we are all taught a lesson of temperance, and forbidden to desire dainties and varieties.