Sahih Muslim 2732
Sahih Muslim · Book 48: The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness · The Virtue Of Praying For The Muslims In Their Absence
وَحَدَّثَنَاهُ أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ ، عَنْ عَبْدِ الْمَلِكِ بْنِ أَبِي، سُلَيْمَانَ بِهَذَا الإِسْنَادِ مِثْلَهُ وَقَالَ عَنْ صَفْوَانَ بْنِ عَبْدِ اللَّهِ بْنِ صَفْوَانَ ، .
This hadith has been narrated on the authority of Safwan b. 'Abdullah b. Safwan with the same chain of transmitters.