Friends:

The 3 domains of the Noble 8-Fold Way:


A former husband Visākha of the Nun (Bhikkhuni) Dhammadinnā once asked her:
Venerable Dhammadinnā, are these 3 domains of morality (sīla), concentration
(samādhi), and understanding (pañña) included in the Noble 8-fold Way, or is it
rather instead the Noble 8-fold Way that is included & divided into these 3 core
domains of the training?
These 3 domains, Visākha, are not included in the Noble 8-fold Way, but rather
the Noble 8-fold Way is included in those 3 domains like this:
Right speech, right action, and right livelihood: These 3 things are included
in the domain of morality.
Right effort, right awareness, & right concentration: These 2 things are included
in the domain of concentration..
Right view and right motivation: These 2 things are included
in the domain of understanding...

Further study on the Noble 8-fold Way:
https://What-Buddha-Said.net/drops/IV/The_Sun.htm
https://What-Buddha-Said.net/drops/II/The_Way.htm
https://What-Buddha-Said.net/drops/II/Middle_Way.htm
https://What-Buddha-Said.net/drops/II/Noble_Purpose.htm
https://What-Buddha-Said.net/drops/II/Seed_of_Good.htm
https://What-Buddha-Said.net/drops/II/Fulfilled_First_.htm
https://What-Buddha-Said.net/drops/Noble_8_fold_Way.htm
https://What-Buddha-Said.net/drops/V/Entry_Emergence.htm
https://What-Buddha-Said.net/drops/What_is_Right_View.htm
https://What-Buddha-Said.net/drops/II/Rare_Emergence.htm
https://What-Buddha-Said.net/drops/II/The_Other_Side.htm
https://What-Buddha-Said.net/drops/V/Certain_Rightness.htm

Source Text (extract): Majjhima Nikāya 44:
Culavedalla Sutta: The Shorter Set of Questions-and-Answers
https://what-buddha-said.net/library/ati_website/html/tipitaka/mn/mn.044.than.html

Noble is the 8-fold Way..