The Buddha went to the hermitage of Uruvelā Kassapa and said to him, “If it’s not inconvenient for you, Kassapa, may I stay for one night in your fire hut?” “It’s not inconvenient for me, Great Ascetic, but there’s a fierce and highly venomous dragon king with supernormal powers there. I don’t want it to harm you.” The Buddha asked a second and a third time, and on both occasions Uruvelā Kassapa replied as before. The Buddha then said, “Perhaps it won’t harm me. Come on, Kassapa, let me to stay in the fire hut.” “Well then, do as you like.” The Buddha entered the fire hut and prepared a spread of grass. He sat down, crossed his legs, straightened his body, and established mindfulness in front of him. When the dragon saw that the Buddha had entered, he was displeased and emitted smoke. The Buddha thought, “Let me overpower this dragon, using fire against fire, but without harming it in the slightest way.”