(lit. 'message'): the Dispensation of the Buddha, the Buddhist religion; teaching, doctrine.
Navanga-Buddha (or satthu)-sāsana, the nine-fold Dispensation of the Buddha (or the Master) consists of
This classification is often found in the suttas (e.g. M.22).
According to the commentaries, also the Vinaya and the Abhidhamma Pitaka are comprised in that nine-fold division (see Atthasālini Tr., I, 33).
It is a classification according to literary styles, and not according to given texts or books.