Sarvārthasiddhi

Sarvārthasiddhi is a famous Jain text authored by Ācārya Pujyapada. It is the oldest extant commentary on Ācārya Umaswami's Tattvārthasūtra (another famous Jain text). Traditionally though, the oldest commentary on the Tattvārthasūtra is the Gandhahastimahābhāṣya. A commentary is a word-by-word or line-by-line explication of a text.