At Savatthi. "Bhikkhus, this is the forerunner and precursor of the rising of the sun, that is, the dawn. So too, bhikkhus, for a bhikkhu this is the forerunner and precursor for the arising of the Noble Eightfold Path, that is, good friendship. When a bhikkhu has a good friend, it is to be expected that he will develop and cultivate this Noble Eightfold Path."
With gratitude to friends here at Dhamma Wheel.