Bhagirath Prasad Tripathi (15 July 1935 – 11 May 2022),[1] better known as Vagish Shastri, was an Indian scholar of Sanskrit grammar, linguist, tantra and yogi.

In 1970, he became Director and Professor of the Research Institute at Sampurnanand Sanskrit University, Varanasi,[4] a position he held for three decades.

He received a master's degree (Vyākaraņa Āchārya) in 1959, and a PhD (Vidyāvāridhi) in Grammar and Historical Linguistics in 1964.

He served as secretary president of one section in the fifth World Sanskrit conference and as chief editor of many series such as Sarasvati Bhavana Granthamala; he also edited more than 300 manuscripts which were published as books.

Pāniniya Dhātupātha Samikşhā (1965) is an ambitious work in this area, providing an alphabetically arranged catalogue of roots found in different Dhatupathas along with attestations (verbal and nominal forms) in Sanskrit Grammar, Pali, Apabhramsa and other Prakrits.