Pitusutta

Suttapiṭaka · Saṁyuttanikāya · Nidānavaggasaṁyutta · Vol. 16 · Section 451

[451] Dwelling at Sāvatthī … There the Blessed One … "Bhikkhus, this saṃsāra is without discoverable beginning …" "Bhikkhus, it is not easy to find a being who has not formerly been one's father …" The Fifth.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.