增壹阿含經 19.2.p4

19.2.p4

“What is that essential path that achieves right awakening, gives rise to vision and knowledge, stills the mind, attains the penetrating knowledges and fruits of the ascetic, and arrives at nirvāṇa? It’s this noble eightfold path, which is right view, right governance, right speech, right action, right livelihood, right method, right mindfulness, and right concentration. This is called the essential path.