Digha Nikaya 1:1338
SUJATOImesañhi, ānanda, pañcannaṁ bhikkhusatānaṁ yo pacchimako bhikkhu, so sotāpanno avinipātadhammo niyato sambodhiparāyaṇo”ti.
Even the last of these five hundred mendicants is a stream-enterer, not liable to be reborn in the underworld, destined for awakening.”