In his complaint before the metropolitan magistrate's court, Yakubkhan Pathan alleged that a city-based Sharia court (Darul Qaza) summoned him and his son Firozkhan Pathan by putting out a notice in a newspaper.
The notice, dated June 13, warned that if they did not remain present, the court would dissolve Firozkhan's marriage with his wife Lubna Vohra.
Lubna has filed a divorce petition, as also a case of domestic violence against Firoz and his family.
It also adds that the Sharia court passed an illegal order asking Firoz to grant his wife divorce, which was "insult of Indian legal system".
The court would hear the defamation case on July 16.
Yesterday, the Supreme Court said that Sharia courts have no legal sanctity and their rulings are not binding on anyone.