“Bhante nāgasena, ‘vaṃsassa ekaṃ aṅgaṃ gahetabban’ti yaṃ vadesi, katamaṃ taṃ ekaṃ aṅgaṃ gahetabban”ti? “Yathā, mahārāja, vaṃso yattha vāto, tattha anulometi, ­nāññat­tha­manu­dhāvati; evameva kho, mahārāja, yoginā yogāvacarena yaṃ buddhena bhagavatā bhāsitaṃ navaṅgaṃ satthusāsanaṃ, taṃ anulomayitvā kappiye anavajje ṭhatvā samaṇa­dhammaṃ­yeva pariyesitabbaṃ. Idaṃ, mahārāja, vaṃsassa ekaṃ aṅgaṃ gahetabbaṃ. Bhāsitampetaṃ, mahārāja, therena rāhulena—

‘Navaṅgaṃ buddhavacanaṃ,
anulometvāna sabbadā;
Kappiye anavajjasmiṃ,
ṭhatvāpāyaṃ samuttarin’”ti.

Vaṃsaṅgapañho sattamo.