This manuscript describes the time when the Buddha went to teach Abhidhamma (The basket of higher teaching) such as Dhammasaṅgiṇī, Vibhaṅga, Dhātukathā, Pukkalapaññatti, Kathāvatthu, Yamaka, and Mahāpaṭṭhāna, to his divine mother in the Dusita heaven.
Colophon:
แล้วยามตูดช้าย วัน 4 ฯ
[I] finished copying [this manuscript] in the afternoon on a Wednesday.
Other notes:
(Front cover, written with blue ink) “Front cover of Phra Abhidhamma Piṭaka”.
(The left-hand side of the first folio) “Abhidhamma Piṭaka”.