حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ حَدَّثَنَا مُطَرِّفٌ عَنْ أَبِي الْجَهْمِ عَنْ أَبِي الرَّضْرَاضِ عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ كُنْتُ أُسَلِّمُ عَلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الصَّلَاةِ فَيَرُدُّ عَلَيَّ فَلَمَّا كَانَ ذَاتَ يَوْمٍ سَلَّمْتُ عَلَيْهِ فَلَمْ يَرُدَّ عَلَيَّ فَوَجَدْتُ فِي نَفْسِي فَلَمَّا فَرَغَ قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي إِذَا كُنْتُ سَلَّمْتُ عَلَيْكَ فِي الصَّلَاةِ رَدَدْتَ عَلَيَّ قَالَ فَقَالَ إِنَّ اللَّهَ عَزَّ وَجَلَّ يُحْدِثُ فِي أَمْرِهِ مَا يَشَاءُ
مسند امام احمد بن حنبل · Hadith 3885
It was narrated that 'Abdullah (RA) said: I used to greet the Messenger of Allah (PBUH) when he was praying and he would return my greeting. One day I greeted him [when he was praying] but he did not return the greeting and I felt sad. When he had finished praying I said: O Messenger of Allah, T used to greet you when you were praying and you would return the greeting. He said: "Allah introduces what- ver He wants into His matter [i.e., religion]."
Sanad
حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ حَدَّثَنَا مُطَرِّفٌ عَنْ أَبِي الْجَهْمِ عَنْ أَبِي الرَّضْرَاضِ عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ