Dutiyasamudayasutta
Bārāṇasiyaṁ viharanti isipatane migadāye …pe… ekamantaṁ nisinno kho āyasmā mahākoṭṭhiko āyasmantaṁ sāriputtaṁ etadavoca: “‘vijjā, vijjā’ti, āvuso sāriputta, vuccati. Katamā nu kho, āvuso, vijjā; kittāvatā ca vijjāgato hotī”ti?
Origin (2nd)
At Varanasi. Mahākoṭṭhita said to Sāriputta: “Reverend Sāriputta, they speak of this thing called ‘knowledge’. What is knowledge? And how is a knowing one defined?”