Duldul was a mule owned by the Islamic prophet Muhammad.
After serving as his mount during his campaigns, she survived him and died at Yanbuʿ so old and toothless that in order to feed her the barley had to be put into her mouth.
According to the S̲h̲īʿī tradition, ʿAlī rode upon her at the battle of the Camel and at Ṣiffīn.
The first Safavid Emperor, Ismail I, rose to power as the leader of Kizilbash, antinomian Sufi warriors who were fervently Alid.
Ismail, a noted poet under the pen name Hatayi, justified his own divine role as leader by variously writing that he himself is Ali's offspring; he is Ali himself; he possesses Zulfiqar, Duldul and ‘Ali’s hat.