Cundasutta

Suttapiṭaka · Saṁyuttanikāya · Mahāvaggasaṁyutta · Vol. 19 · Section 738

[738] "Just as, Ānanda, when a great tree possessed of heartwood is standing, the largest trunk might break off; even so, Ānanda, when the great Saṅgha of bhikkhus, possessed of heartwood, is standing, Sāriputta has attained final Nibbāna (parinibbuta). How, Ānanda, could it be obtained here: 'May that which is born, come to be, conditioned, and subject to disintegration not disintegrate'? That is not possible. Therefore, Ānanda, dwell with yourselves as islands, with yourselves as refuge, with no other refuge; with the Dhamma as island, with the Dhamma as refuge, with no other refuge."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.