Abū Naṣr Farāhī, Badr al-Dīn Masʿūd or Muḥammad b. Abī Bakr b. al-Ḥusayn Farāhī Sijzī (d. 640/1242), was a Persian poet and lexicographer. He was born in Farāh (or Farah), one of the towns of Sīstān (Rāzī, 300–301). There are very few details as regards when he was born or the course of his life. It is only known that he lived during the rule of the last of the Maliks of Nīmrūz or Sīstān and the early period after the first Mongol invasion.

Though born blind, he nonetheless managed to acquire a notable reputation in the field of Arabic and Persia…