Muhammad Ibn Sa'd was a renowned early Islamic historian and biographer, best known for his monumental work, Kitab At-Tabaqat Al-Kabir. As a student of the famous scholar Al-Waqidi, Ibn Sa'd documented detailed biographies of the Prophet Muhammad ﷺ, his Companions, and prominent figures of early Islam. His meticulous records provide invaluable insights into the social, cultural, and spiritual lives of early Muslims.