2-6.
The Set of Five Discourses Beginning with the Accomplishment in Morality
78-82.
"I do not, monks, perceive any other single phenomenon by which the unarisen noble eightfold path arises, or the arisen noble eightfold path goes to fulfilment through development, as does, monks, accomplishment in morality... etc.
as does, monks, accomplishment in desire... etc.
as does, monks, accomplishment in self... etc.
as does, monks, accomplishment in right view... etc.
as does, monks, accomplishment in diligence... etc.
The sixth.