This was explained at Savatthi.
‘There are, O'Bhikkhus, eight states that if cultivated and developed lead to the state to which no further and no hither states exist. What are these eight?
They are right view, right thought, right speech, right action, right livelihood, right effort, right awareness, and right concentration.
These, O'Bhikkhus, are the eight states that if cultivated and developed lead to the state to which neither hither nor further states exist.’
Thus spoke the Bhagavā. Having spoken thus the Wellgone One added further. The teacher spoke thus.
‘So few are there amongst……’