It was narrated that ‘Ata’ bin as-Sa`ib said:

l entered upon Abu ‘Abdur-Rahman as-Sulami who had prayed Fajr and was sitting in the mosque.I said: Why don`t you go to your bed, for it will be more comfortable for you? He said: I heard `Ali (رضي الله عنه) say: I heard the Messenger of Allah (ﷺ) say: “Whoever pray Fajr, then sits in the place where he has prayed, the angels will send blessings upon him and their blessings upon him will be: ‘O Allah, forgive him. O Allah, have mercy on him.` And whoever waits for the prayer, the angels will send blessings upon him and their blessings upon him will be: `O Allah, forgive him, O Allah, have mercy on him.”

حَدَّثَنَا حُسَيْنُ بْنُ مُحَمَّدٍ، حَدَّثَنَا إِسْرَائِيلُ، عَنْ عَطَاءِ بْنِ السَّائِبِ، 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 وَسَلَّمَ يَقُولُ مَنْ صَلَّى الْفَجْرَ ثُمَّ جَلَسَ فِي مُصَلَّاهُ صَلَّتْ عَلَيْهِ الْمَلَائِكَةُ وَصَلَاتُهُمْ عَلَيْهِ اللَّهُمَّ اغْفِرْ لَهُ اللَّهُمَّ ارْحَمْهُ وَمَنْ يَنْتَظِرُ الصَّلَاةَ صَلَّتْ عَلَيْهِ الْمَلَائِكَةُ وَصَلَاتُهُمْ عَلَيْهِ اللَّهُمَّ اغْفِرْ لَهُ اللَّهُمَّ ارْحَمْهُ‏.‏