[345] Now at that time the Venerable Bhaddiya, whether gone to the forest, gone to the root of a tree, or gone to an empty dwelling, frequently uttered this inspired utterance (udāna): "Ah, what happiness! Ah, what happiness!" Then several bhikkhus approached the Blessed One; having approached, they paid homage to the Blessed One and sat down to one side. Sitting to one side, those bhikkhus said this to the Blessed One: "Venerable sir, the Venerable Bhaddiya, whether gone to the forest, gone to the root of a tree, or gone to an empty dwelling, frequently utters this inspired utterance: 'Ah, what happiness! Ah, what happiness!' Without doubt, venerable sir, the Venerable Bhaddiya leads the holy life (brahmacariya) without delight; or else, recollecting that former happiness of kingship, whether gone to the forest, gone to the root of a tree, or gone to an empty dwelling, he frequently utters this inspired utterance: 'Ah, what happiness! Ah, what happiness!'"
Then the Blessed One addressed a certain bhikkhu: "Come, bhikkhu, in my name summon the bhikkhu Bhaddiya, saying: 'Friend Bhaddiya, the Teacher summons you.'" "Yes, venerable sir," that bhikkhu replied to the Blessed One; he approached the Venerable Bhaddiya, and having approached, he said this to the Venerable Bhaddiya: "Friend Bhaddiya, the Teacher summons you."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.