Sahih al-Bukhari 7434
Narrated Jarir:
We were sitting with the Prophet (ﷺ) and he looked at the moon on the night of the full-moon and said, 
"You people will see your Lord as you see this full moon, and you will have no trouble in seeing Him, 
so if you can avoid missing (through sleep or business, etc.) a prayer before sunrise (Fajr) and a prayer 
before sunset (`Asr) you must do so." (See Hadith No. 529, Vol. 1)
حَدَّثَنَا عَمْرُو بْنُ عَوْنٍ، حَدَّثَنَا خَالِدٌ، وَهُشَيْمٌ، عَنْ إِسْمَاعِيلَ، عَنْ قَيْسٍ، عَنْ جَرِيرٍ، قَالَ كُنَّا جُلُوسًا عِنْدَ النَّبِيِّ صلى الله عليه وسلم إِذْ نَظَرَ إِلَى الْقَمَرِ لَيْلَةَ الْبَدْرِ قَالَ ‏
"‏ إِنَّكُمْ سَتَرَوْنَ رَبَّكُمْ كَمَا تَرَوْنَ هَذَا الْقَمَرَ لاَ تُضَامُّونَ فِي رُؤْيَتِهِ، فَإِنِ اسْتَطَعْتُمْ أَنْ لاَ تُغْلَبُوا عَلَى صَلاَةٍ قَبْلَ طُلُوعِ الشَّمْسِ وَصَلاَةٍ قَبْلَ غُرُوبِ الشَّمْسِ، فَافْعَلُوا ‏"‏‏.‏