Sayyid Muhammad bin Fadlallah al-Sarawi, honorifically titled as Thiqat al-Islam, also known as Muhammad Thiqat al-Islam was an Iranian-Iraqi Ja'fari jurist, writer and poet. He has been renowned at the end of the Qajar era, i.e. the early twentieth century, as a bilingual poet in Persian and Arabic. He was born in Pahneh Kola, a village of Sari to a Tabari Musawi family. He first started his religious educations with his father then moved to Ottoman Iraq and studied from ulema of Najaf and Samarra, such as Mirza Shirazi. His efforts to promote da'wah in Iran failed. As a Twelver Shia mujtahid, he settled in Najaf from 1901 until his death, left behind two poetry collections and many books on fiqh, most of them are manuscript.