Once, the Shias set up a debate with Hadhrat Moulana Ismaeel Shaheed Sahib رحمة الله عليه . The place for the debate was arranged outside the town and one of them had come with the intention of assassinating Moulana. Moulana managed to protect himself by locking himself up in a musjid.
The Shia came and knocked at the door. Moulana asked who it was, to which the person replied that it was Kalb-e-Ali (the dog of Ali).
Hadhrat Moulana sorrowfully replied, “This is the house of Allah Ta’ala. When the dog of Allah Ta’ala is not allowed in here, how can the dog of Ali be allowed?”
Moulana did not open the door and the Shia eventually left.
Pg 319 Malfoozaat of Faqeehul Ummat, Mufti Mahmood Gangohi Rahmatullahi alaihi
Ummati Islamic Website