AbdurRahman ibn Ka'b ibn Malik said: When Ka'b ibn Malik heard the call to prayer on Friday, he prayed for As'ad ibn Zurarah. I asked him: What is the matter that when you hear the call to prayer, you pray for As'ad ibn Zurarah? He replied: This is because he held the Friday prayer for the first time for us at Hazm an-Nabit of Harrah belonging to Banu Bayadah in Naqi', called Naqi' al-Khadumat. I asked him: How many were you at that time ? He said: Forty.
Reference: Sunan Abi Dawud 1069 In-book : Book 2, Hadith 680 English translation : Book 3, Hadith 1064
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