Nigrodhakappa (vaṅgīsa) sutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā āḷaviyaṁ viharati aggāḷave cetiye. Tena kho pana samayena āyasmato vaṅgīsassa upajjhāyo nigrodhakappo nāma thero aggāḷave cetiye aciraparinibbuto hoti. Atha kho āyasmato vaṅgīsassa rahogatassa paṭisallīnassa evaṁ cetaso parivitakko udapādi— parinibbuto nu kho me upajjhāyo udāhu no parinibbutoti? Atha kho āyasmā vaṅgīso sāyanhasamayaṁ paṭisallānā vuṭṭhito yena bhagavā tenupasaṅkami; upasaṅkamitvā bhagavantaṁ abhivādetvā ekamantaṁ nisīdi. Ekamantaṁ nisinno kho āyasmā vaṅgīso bhagavantaṁ etadavoca— idha mayhaṁ, bhante, rahogatassa paṭisallīnassa evaṁ cetaso parivitakko udapādi— parinibbuto nu kho me upajjhāyo, udāhu no parinibbutoti. Atha kho āyasmā vaṅgīso uṭṭhāyāsanā ekaṁsaṁ cīvaraṁ katvā yena bhagavā tenañjaliṁ paṇāmetvā bhagavantaṁ gāthāya ajjhabhāsi:
Vaṅgīsa and His Mentor Nigrodhakappa
So I have heard. At one time the Buddha was staying near Āḷavī, at Āḷavī’s premier shrine. Now at that time it was not long after Venerable Vaṅgīsa’s mentor, the senior monk named Nigrodhakappa, had become fully quenched. Then as Vaṅgīsa was in private retreat this thought came to his mind: “Has my mentor become quenched or not?” Then in the late afternoon, Venerable Vaṅgīsa came out of retreat and went to the Buddha. He bowed, sat down to one side, and said to him: “Just now, sir, as I was in private retreat this thought came to mind. ‘Has my mentor become quenched or not?’” Then Venerable Vaṅgīsa rose from his seat, arranged his robe over one shoulder, raised his cupped palms toward the Buddha, and addressed him in verse: