Repentant retrospection- The fourth chapter of the Āvaśyaka Sūtra (canonical work consisting of Sadāvaśyaka (six chapters to be recited daily at both twilights);
recitation of which is performed as an exercise in self-introspection, through which one washes off one's past blemishes; the Pratikramana (Sadāvaśyaka) is performed everyday at twilight (before sunrise and after sunset).
skhalitasya nindā pratikramanārthādhikārah.
(Ānu 74 HāVṛ p. 25)
atitadosanivartanam pratikramanam.
(TaVā 6.24.11)
'pratikramanam' ubhayakālam sadvidhāvaśya- kakaranayukto dharmah.
(BṛBhā 3425 Vṛ)