Abdur Rahman bin Ka'b bin Malik (may Allah have mercy on him) narrates that after my father's eyesight was lost, I used to guide him. Whenever he heard the call to Friday prayer, he would say: O Allah! Have mercy on Abu Umamah. I said to my father: I am surprised that whenever you hear the call to Friday prayer, you pray for mercy for Abu Umamah. He replied: Son! He was the first person who led us in Friday prayer in a garden in the village of Hazm al-Nabiyyat, which is called Naqi' al-Khasmat. It is located within Madinah in Harrah Bani Bayadah. I asked: How many people were you that day? He replied: Forty.