Digha Nikaya (Coleção dos Discursos Longos) 1:453
SUJATO‘na tāva bhagavā parinibbāyissati, na yāva bhagavā bhikkhusaṅghaṁ ārabbha kiñcideva udāharatī’”ti.
the Buddha won’t be fully extinguished without bringing something up regarding the Saṅgha of mendicants.”