I came to God’s Messenger when he was praying and sat down, but did not join the congregation in prayer. When he finished he saw me sitting and asked, “Have you not become a Muslim, Yazid?” I replied, “I certainly have become a Muslim, Messenger of God.” He asked, “What prevented you from joining the people in their prayer?” I replied, “I had already prayed at home, thinking you had prayed.” So he said, “When you come to prayer and find the people praying, pray along with them. If you have already prayed it will be a supererogatory prayer for you, though this is a prescribed prayer.” Abu Dawud transmitted it.
Reported by Abu Dawud (No. 577). Cited in Mishkat al-Masabih (No. 1155).
وَعَنْ يَزِيدَ بْنِ اَلْأَسْوَدِ - رضى الله عنه - { أَنَّهُ صَلَّى مَعَ رَسُولِ اَللَّهِ - صلى الله عليه وسلم -صَلَاةَ اَلصُّبْحِ, فَلَمَّا صَلَّى رَسُولُ اَللَّهِ - صلى الله عليه وسلم -إِذَا هُوَ بِرَجُلَيْنِ…
Jābir ibn Yazīd ibn al-Aswad reported that his father prayed along with the Messenger of Allah (may Allah's peace and blessings be upon him) when he was a young boy. When he (the Prophet) had prayed, there were two people (sitting) in the corner of the mosque; they did not pray (along with the…