Hadith 1852
عَنْ عَطَاءِ بْنِ السَّائِبِ عَنْ أَبِي عَبْدِ الرَّحْمَنِ قَالَ: سَمِعْتُ عَلِيًّا يَقُولُ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((إِنَّ الْعَبْدَ إِذَا جَلَسَ فِي مُصَلَّاهُ بَعْدَ الصَّلَاةِ صَلَّتْ عَلَيْهِ الْمَلَائِكَةُ، وَصَلَاتُهُمْ عَلَيْهِ: اللَّهُمَّ اغْفِرْ لَهُ اللَّهُمَّ ارْحَمْهُ))
It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Indeed, when a servant remains seated in his place of prayer after performing the prayer, the angels supplicate for mercy for him, and their supplication for mercy is: "O Allah, forgive him. O Allah, have mercy on him."
Hadith 1853
(وَعَنْهُ مِنْ طَرِيقٍ ثَانٍ) قَالَ: دَخَلْتُ عَلَى أَبِي عَبْدِ الرَّحْمَنِ السُّلَمِيِّ وَقَدْ صَلَّى الْفَجْرَ وَهُوَ جَالِسٌ فِي الْمَجْلِسِ فَقُلْتُ: لَوْ قُمْتَ إِلَى فِرَاشِكَ كَانَ أَوْطَأَ لَكَ، فَقَالَ: سَمِعْتُ عَلِيًّا رَضِيَ اللَّهُ عَنْهُ يَقُولُ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ: ((مَنْ صَلَّى الْفَجْرَ ثُمَّ جَلَسَ فِي مُصَلَّاهُ صَلَّتْ عَلَيْهِ الْمَلَائِكَةُ … )) (وَذَكَرَ نَحْوَ الْحَدِيثِ الْمُتَقَدِّمِ)
. (Second chain) Ata bin Saib says: I went to Abu Abdur Rahman Sulami while he was sitting on his prayer mat after performing the Fajr prayer. I said to him: If you get up and go to your bed, it would be more comfortable for you. He replied: I heard Sayyiduna Ali (may Allah be pleased with him) narrate that the Messenger of Allah (peace and blessings be upon him) said: Whoever, after performing the Fajr prayer, sits on his prayer mat, the angels pray for mercy for him, ... . Then he mentioned as in the previous hadith.