Trường Bộ Kinh (Digha Nikaya) 1:1275
SUJATOYasmiñca kho, subhadda, dhammavinaye ariyo aṭṭhaṅgiko maggo upalabbhati, samaṇopi tattha upalabbhati, dutiyopi tattha samaṇo upalabbhati, tatiyopi tattha samaṇo upalabbhati, catutthopi tattha samaṇo upalabbhati.
In whatever teaching and training the noble eightfold path is found, there is an ascetic found, a second ascetic, a third ascetic, and a fourth ascetic.