The Long Āgama Sūtra 26.65

26.65

時，婆悉咤、頗羅墮俱白佛言：「且置此論，我聞沙門瞿曇明識梵道，能為人說，又與梵天相見往來言語，唯願沙門瞿曇以慈愍故，說於梵道，開示演布。」

Vāsiṣṭha and Bhāradvāja then both said to the Buddha, “Setting aside this discussion, we’ve heard that the ascetic Gautama is clearly aware of the way to Brahmā and explains it for others. He also relates how he sees others reborn with Brahmā. Please let the ascetic Gautama discuss the way to Brahmā out of compassion for us. Make it a plain and detailed explanation!”