Majjhima Nikaya (Coleção dos Discursos Médios) 5:137
SUJATOKullūpamaṁ vo, bhikkhave, dhammaṁ desitaṁ, ājānantehi dhammāpi vo pahātabbā pageva adhammā.
By understanding the simile of the raft, you will even give up the teachings, let alone what is not the teachings.