Sad Sandarbhas (Six Sandarbhas) is a 16th century Vaishnava Sanskrit text, authored by Gaudiya Vaishnava theologian Jiva Goswami. According to Jiva Goswami, Gopala Bhatta Goswami had already done the preliminary work on Sat Sandarbhas but did not complete it. Jiva took the work of Gopala Bhatta and expanded it into six parts, systematically presenting the philosophy of Chaitanya Mahaprabhu and providing scriptural evidences. Jiva Goswami also wrote an extensive commentary to the Sat Sandarbhas called Sarva-samvadini. The six Sandarbhas are as follows: