A certain brother was hungry one morning, and he fought against his inclination and determined not to eat until the third hour. And when the third hour had passed, he dipped his bread in water, and sat down to eat, but he forced himself to wait until the sixth hour arrived, when he said within himself, “Let us wait until the ninth hour.” And when the ninth hour had come, he prayed, and saw the working of Satan rising up before him like smoke, and he suppressed his desire to eat, and his hunger passed away from him.

Paradisus Patrum