Full name Abu Muhammad Sadr al-Din Ruzbihan b. Abi'n-Nasr al-Baqli; born in Fasa in the Fars region of Iran, he was a Persian Sufi, scholar and poet known as 'Shaykh-i Shattah' for his famous ecstatic utterances. He founded the Ruzbihaniyya order at his ribat in Shiraz, continuing the Khafifiyya line tracing back to Ibn Khafif. He died in 606 (1209) in Shiraz.