Ekottaragama (Sanskrit fragments) 24.5.41

24.5.41

爾時，世尊即往石室，敷座而宿，結跏趺坐，正身正意，繫念在前。是時，毒龍見世尊坐，便吐火毒。爾時，世尊入慈三昧，從慈三昧起，入焰光三昧。爾時，龍火、佛光一時俱作。

The Bhagavān then went to the cave and prepared a seat for the night. Sitting down cross-legged with upright body and mind, he fixed his attention to what was in front of him. The poisonous serpent saw the Bhagavān sitting there and spat flaming venom at him. The Bhagavān at that moment had entered a concentration of kindness. He emerged from that concentration of kindness and entered a concentration of blazing light. The serpent’s fire and the Buddha’s light met at the same time.