Sayyid Jamal al-Din "Va'iz" Esfahani (Persian: سید جمالالدین واعظ اصفهانی; also known as Seyed Jamal Vaez ["The Preacher"], 1862–1908) was a popular pro-constitutional preacher and writer in Iran. He was one of the founders of a constitutional movement in Isfahan in 1890s. He wrote for the reformist newspapers - especially for Al Jamal. He wrote mostly about the economy and the financial autonomy of Persia, which he compared it to jihad. He is the father of Iranian writer Mohammad Ali Jamalzadeh.