Ekottaragama (Sanskrit fragments) 24.5.103

24.5.103

是時，世尊食已，還石室止宿。即夜，四天王至世尊所而聽經法，四天王亦有光明，佛亦大放光，照彼山野，洞然一色。

After the Bhagavān had eaten, he returned to the cave for the night. That night, the four god kings visited the Bhagavān and listened to the sūtra teachings. The four god kings were radiant, and the Buddha also emitted a great radiance. They illuminated the mountain forest, which blazed with a single color.