The Pali Abhidhamma, contrary to some traditional views, is not
taught by Buddha and wasn't recited and included at the First
Buddhist Council but is something authored hundreds of years later
and included into the canon in the Third Buddhist Council.
And, I believe you have posted at a totally wrong topic.
Many scholars generally believe that the Abhidharma emerged
after the time of the Buddha, to around the third century BCE.
Therefore the seven Abhidhamma works are generally claimed by
scholars not to represent the words of the Buddha himself, but
those of disciples and great scholars.[1] Factors
contributing to its development could have been the growth of
monastic centers, the growing support for the Buddhist sangha and/or outside influences from other religious
groups. Some scholars believe that the Abhidhamma represents an
expansion of a set of teachings and categorisations that were
employed during the earliest period of Buddhism and were then later
developed and elaborated upon.
As the last major division of the canon, the Abhidhamma works
have had a checkered history. They were not accepted as canonical
by the Mahasanghika
school[1][5] and several
other schools.[6] Another school
included most of the Khuddaka Nikaya within the Abhidhamma
Pitaka.[1] Also, the
Pali version of the Abhidhamma is a strictly Theravada collection,
and has little in common with the Abhidhamma works recognized by
other Buddhist schools.[7] The Theravadin
Abhidhamma is in some respects rather skeletal, with the details
not entirely fleshed out. According to Rupert Gethin however,
obvious care and ingenuity have gone into its
development.[8]
The various Abhidhamma philosophies of the various early schools
have no agreement on doctrine[9] and belong
to the period of 'Divided Buddhism'[9] (as opposed
to Undivided
Buddhism). The earliest texts of the Pali Canon (the Sutta Nipata, parts of the Jatakas, and the first four Nikayas of the Suttapitaka) have no mention of (the texts
of) the Abhidhamma Pitaka.[10] The Abhidhamma
is also not mentioned at the report of the First Buddhist
Council, directly after the death of the Buddha. This report of
the first council does mention the existence of the Vinaya and the five Nikayas (of the Suttapitaka).[11][12]