Asadī Ṭūsī, Abū Manṣūr (or Abū Naṣr) ʿAlī b. Aḥmad (d. ca. 465/1073), was a poet, linguist and copyist of Persian origin. Despite his stature and extensive research by both Western and Eastern scholars, even the basic outlines of his life are still unknown. The little information that we have comes from sources of two kinds.

The first comprises scattered references in Asadī’s own works and brief references in other sources. In the colophon of the copy he made of Abū Manṣūr Muwaffaq Harawī’s medical treatise al-Abniya, he gives his proper name, takhalluṣ …