Catutthasāriputtakoṭṭhikasutta
Ekaṁ samayaṁ āyasmā ca sāriputto, āyasmā ca mahākoṭṭhiko bārāṇasiyaṁ viharanti isipatane migadāye. Atha kho āyasmā sāriputto sāyanhasamayaṁ paṭisallānā vuṭṭhito yenāyasmā mahākoṭṭhiko tenupasaṅkami; upasaṅkamitvā āyasmatā mahākoṭṭhikena saddhiṁ sammodi. Sammodanīyaṁ kathaṁ sāraṇīyaṁ vītisāretvā ekamantaṁ nisīdi. Ekamantaṁ nisinno kho āyasmā sāriputto āyasmantaṁ mahākoṭṭhikaṁ etadavoca: “‘kiṁ nu kho, āvuso koṭṭhika, hoti tathāgato paraṁ maraṇā’ti …pe… ‘kiṁ panāvuso, neva hoti na na hoti tathāgato paraṁ maraṇā’ti iti puṭṭho samāno: ‘etampi kho, āvuso, abyākataṁ bhagavatā— neva hoti na na hoti tathāgato paraṁ maraṇā’ti vadesi. Ko nu kho, āvuso, hetu, ko paccayo, yenetaṁ abyākataṁ bhagavatā”ti?
With Sāriputta and Koṭṭhita (4th)
At one time Venerable Sāriputta and Venerable Mahākoṭṭhita were staying near Varanasi in the deer park at Isipatana. Then in the late afternoon, Venerable Sāriputta came out of retreat, went to Venerable Mahākoṭṭhita, and they greeted each other. When the greetings and polite conversation were over, he sat down to one side and said to Mahākoṭṭhita: “Reverend Koṭṭhita, does a realized one still exist after death?” … “Reverend, when asked these questions, you say that this has not been declared by the Buddha. What’s the cause, what’s the reason why this has not been declared by the Buddha?”