Nakhasikhāsutta
Sāvatthinidānaṁ. Ekamantaṁ nisinno kho so bhikkhu bhagavantaṁ etadavoca: “atthi nu kho, bhante, kiñci rūpaṁ yaṁ rūpaṁ niccaṁ dhuvaṁ sassataṁ avipariṇāmadhammaṁ sassatisamaṁ tatheva ṭhassati? Atthi nu kho, bhante, kāci vedanā yā vedanā niccā dhuvā sassatā avipariṇāmadhammā sassatisamaṁ tatheva ṭhassati? Atthi nu kho, bhante, kāci saññā …pe… keci saṅkhārā, ye saṅkhārā niccā dhuvā sassatā avipariṇāmadhammā sassatisamaṁ tatheva ṭhassanti? Atthi nu kho, bhante, kiñci viññāṇaṁ, yaṁ viññāṇaṁ niccaṁ dhuvaṁ sassataṁ avipariṇāmadhammaṁ sassatisamaṁ tatheva ṭhassatī”ti? “Natthi kho, bhikkhu, kiñci rūpaṁ, yaṁ rūpaṁ niccaṁ dhuvaṁ sassataṁ avipariṇāmadhammaṁ sassatisamaṁ tatheva ṭhassati. Natthi kho, bhikkhu, kāci vedanā … kāci saññā … keci saṅkhārā …pe… kiñci viññāṇaṁ, yaṁ viññāṇaṁ niccaṁ dhuvaṁ sassataṁ avipariṇāmadhammaṁ sassatisamaṁ tatheva ṭhassatī”ti.
A Fingernail
At Sāvatthī. Seated to one side, that mendicant said to the Buddha: “Sir, is there any form at all that’s permanent, everlasting, eternal, imperishable, and will last forever and ever? Is there any feeling … perception … choices … consciousness at all that’s permanent, everlasting, eternal, imperishable, and will last forever and ever?” “Mendicant, there is no form at all that’s permanent, everlasting, eternal, imperishable, and will last forever and ever. There’s no feeling … perception … choices … consciousness at all that’s permanent, everlasting, eternal, imperishable, and will last forever and ever.”