Abū al-Maʿālī Sayf al-Dīn Saʿīd b. al-Muṭahhar b. Saʿīd Bākharzī (al-Bākharzī, Persian: باخرزی shortened as Sayf al-Dīn Bākharzī, was a poet, sheikh, and theologian who lived in the 13th century. As suggested by his nisba, he was born and raised in Bakharz, a district of the province of Quhistan in Khorasan, and he received his religious education in the cities of Herat and Nishapur. When he achieved unusual successes in mystical teaching, he moved to Khorezm. There he became one of nearest followers of very popular sheikh – Najm ad-Din Kubra. Afterwards, according to the prominent poet Abdurahman Djami Boharsi, Sheikh Saif ed-Din went to Bukhara as a tutor. In Bukhara he was honored with the title of "Sheikh al-Alam".