Prince Jafar Khan was the son of Ahmad Shah I, King of Gujarat Sultanate from 1411 - 1443. In 1429-1430, Ahmad Shah I Wali of the Bahmani Sultanate of Deccan captured Salsette and Mahim in Bombay. Ahmad Shah I retaliated by sending his son Jafar Khan to recapture the lost territory. Jafar emerged victorious in the battle fought between him and Ahmad Shah I Wali. In 1431, Mahim was recaptured by the Sultanate of Gujarat.
References
Jafar Khan (Gujarat Sultanate) Wikipedia(Text) CC BY-SA