Pātimokkhaṭṭhapanakkhandhaka

Vinayapiṭaka · Cūḷavagga (2) · Vol. 7 · Section 452

[452] Furthermore, bhikkhus, whatever great rivers there are — that is to say, the Gaṅgā, the Yamunā, the Aciravatī, the Sarabhū, and the Mahī — upon reaching the great ocean, they give up their former names and lineages and are reckoned simply as 'the great ocean.' Bhikkhus, that whatever great rivers there are — that is to say, the Gaṅgā, the Yamunā, the Aciravatī, the Sarabhū, and the Mahī — upon reaching the great ocean, give up their former names and lineages and are reckoned simply as 'the great ocean' — this, bhikkhus, is the fourth wonderful and marvellous quality of the great ocean, seeing which again and again the asuras delight in the great ocean.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.