Messenger of Allah ﷺ said, "Angels come to you in succession by night and day and all of them get together at the time of the Fajr and ʿAsr prayers. Those who have passed the night with you (or stayed with you) ascend (to the Heaven) and Allah asks them, though He knows everything about you, well, "In what state did you leave my slaves?" The angels reply: "When we left them they were praying and when we reached them, they were praying." (Using translation from Bukhārī 555)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ يَتَعَاقَبُونَ فِيكُمْ مَلَائِكَةٌ بِاللَّيْلِ وَمَلَائِكَةُ بِالنَّهَارِ وَيَجْتَمِعُونَ فِي صَلَاةِ الْفَجْرِ وَصَلَاةِ الْعَصْرِ ثُمَّ يَعْرُجُ الَّذِينَ بَاتُوا فِيكُمْ فَيَسْأَلُهُمْ وَهُوَ أَعْلَمُ بِهِمْ كَيْفَ تَرَكْتُمْ عِبَادِي؟ فَيَقُولُونَ تَرَكْنَاهُمْ وَهُمْ يُصَلُّونَ وَأَتَيْنَاهُمْ وَهُمْ يُصَلُّونَ  

When we are were sitting with the Messenger of Allah (May peace be upon him) he looked at the moon on the night when it was full, that is, fourteenth, and said : You will see your Lord as you see this (moon) and have no doubts about seeing him. If, therefore, you can keep from being prevented from prayer before the sun rises and before it sets, do so. He then recited :”Celebrate the praise of your Lord before the rising of the sun and before its setting”. (Using translation from Abū Dāʾūd 4729)   

كُنَّا جُلُوسًا عِنْدَ رَسُولِ اللهِ ﷺ فَنَظَرَ إِلَى الْقَمَرِ لَيْلَةَ الْبَدْرِ فَقَالَ «أَمَّا إِنَّكُمْ سَتَرَوْنَ رَبَّكُمْ كَمَا تَرَوْنَ هَذَا فَإِنِ اسْتَطَعْتُمْ أَنْ لَا تُغْلَبُوا عَلَى صَلَاةٍ قَبْلَ طُلُوعِ الشَّمْسِ وَقَبْلَ غُرُوبِهَا فَافْعَلُوا» ثُمَّ قَرَأَ {وَسَبِّحْ بِحَمْدِ رَبِّكَ قَبْلَ طُلُوعِ الشَّمْسِ وَقَبْلَ غُرُوبِهَا} [طه 130]  

"Prayer in congregation is twenty-five times more virtuous than the prayer of any one of you offered on his own. The angels of the night and the day meet at Fajr prayer. Recite if you wish: Verily, the recitation of the Qur'an in the early dawn is ever witnessed."[1] [1]Al-Isra' 17:78. (Using translation from Nasāʾī 486)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ تَفْضُلُ صَلَاةُ الْجَمَاعَةِ عَلَى صَلَاةِ أَحَدِكُمْ وَحْدَهُ بِخَمْسَةٍ وَعِشْرِينَ جُزْءًا وَتَجْتَمِعُ مَلَائِكَةُ اللَّيْلِ وَمَلَائِكَةُ النَّهَارِ فِي صَلَاةِ الْفَجْرِ وَاقْرَءُوا إِنْ شِئْتُمْ {وَقُرْآنَ الْفَجْرِ إِنَّ قُرْآنَ الْفَجْرِ كَانَ مَشْهُودًا} [الإسراء 78]  

"I heard the Messenger of Allah ﷺ say: 'No one will enter the Fire who prays before the sun rises and before it sets.'" (Using translation from Nasāʾī 487)  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «لَا يَلِجُ النَّارَ أَحَدٌ صَلَّى قَبْلَ طُلُوعِ الشَّمْسَ وَقَبْلَ أَنْ تَغْرُبَ»