Sahih Muslim Book - 48, Hadith - 6929

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ أَخْبَرَنَا عِيسَى بْنُ يُونُسَ حَدَّثَنَا عَبْدُ الْمَلِكِ بْنُ أَبِى سُلَيْمَانَ عَنْ أَبِى الزُّبَيْرِ عَنْ صَفْوَانَ - وَهُوَ ابْنُ عَبْدِ اللَّهِ بْنِ صَفْوَانَ - وَكَانَتْ تَحْتَهُ الدَّرْدَاء ( بِنْتُ أَبِیْ الدَّرْدَاءِ) قَالَ قَدِمْتُ الشَّامَ فَأَتَيْتُ أَبَا الدَّرْدَاءِ فِى مَنْزِلِهِ فَلَمْ أَجِدْهُ وَوَجَدْتُ أُمَّ الدَّرْدَاءِ فَقَالَتْ أَتُرِيدُ الْحَجَّ الْعَامَ فَقُلْتُ نَعَمْ. قَالَتْ فَادْعُ اللَّهَ لَنَا بِخَيْرٍ فَإِنَّ النَّبِىَّ -صلى الله عليه وسلم- كَانَ يَقُولُ « دَعْوَةُ الْمَرْءِ الْمُسْلِمِ لأَخِيهِ بِظَهْرِ الْغَيْبِ مُسْتَجَابَةٌ عِنْدَ رَأْسِهِ مَلَكٌ مُوَكَّلٌ كُلَّمَا دَعَا لأَخِيهِ بِخَيْرٍ قَالَ الْمَلَكُ الْمُوَكَّلُ بِهِ آمِينَ وَلَكَ بِمِثْلٍ ».

It was narrated that Safwan - who was the son of 'Abdullah bin Safwan, and Darda' (daughter of Abi Darda') was married to him - said: I came to Ash-Sham, and I went to the house of Abu Ad-Darda' but I did not find him there, but I found Umm Ad-Darda' there. She said: Do you intend to go for Hajj this year? I said: Yes. She said: Pray to Allah for good for us, for the Prophet (s.a.w) used to say: "A Muslim's prayer for his brother in his absence will be answered. At his head there is an angel who is appointed, and when he prays for good for his brother, the angel who is appointed says: 'Amin, and you will have something similar."'