An account of the optional fast called Uposadha or Posadha. It is said to have been imparted by Śakhya himelf. The work is divided into three chapters. The 1st treats of the history of the fast, the 2nd, its details; and the 3rd, its obligations. (Mitra, 34) Matsunami notebook 12, p. 68.
Upoṣadhāvadāna, Vaśiṣṭhāvadāna or Sugatāvaśiṣṭhasamvāde poṣaḍhavadāna
General Library, The University of Tokyo