Digha Nikaya 1:660
SUJATONa tāvāhaṁ, pāpima, parinibbāyissāmi, yāva me idaṁ brahmacariyaṁ na iddhañceva bhavissati phītañca vitthārikaṁ bāhujaññaṁ puthubhūtaṁ yāva devamanussehi suppakāsitan’ti.
I shall not be fully extinguished until my spiritual path is successful and prosperous, extensive, popular, widespread, and well proclaimed wherever there are gods and humans.’