1. Kalyanamitta Sutta
Discourse on friendship with the Good and Virtuous

6. Suriya Peyyala Vagga, Magga Samyutta
Mahavagga Samyutta, Samyutta Nikaya, Suttanta Pitaka

        49. The Bhagava was staying at Savatthi. (He said:) bhikkhus, just as the dawn is the forerunner, the preceding sign of the arising of the sun, so also for a bhikkhu friendship with the good and virtuous is the forerunner, the preceding sign of the arising of the Ariya Path of Eight Constituents. Bhikkhus, the bhikkhu who is friendly with the good and virtuous could be expected to develop the Ariya Path of Eight Constituents, to practise the Ariya Path of Eight constituents many times.

        Bhikkhus, how does the bhikkhu who has friendship with the good and virtuous develop the Ariya Path of Eight Constituents, practise the Ariya Path of Eight Constituents many times? Bhikkhus, in this Teaching, the bhikkhu develops Right View which is directed to detachment from defilements, to cessation of defilements and that promotes and develops uprooting of defilements and speedy attainment of Nibbana... p ... develops right concentration which is directed to detachment from defilements, to absence of attachment to defilements, to cessation of defilements and that promotes and develops uprooting of defilements and speedy attainment of Nibbana. In this manner, Bhikkhus, the bhikkhu who has friendship with the good and virtuous develops the Ariya Path of Eight Constituents, practises the Ariya Path of Eight Constituents many times.

End of the Kalyanamitta Sutta,

the first in this Vagga.