"The Messenger of Allah ﷺ used to pray Zuhr when the sun passed its zenith, and he would pray 'Asr between these two prayers; and he would pray Maghrib when the sun had set, and he used to pray 'Isha' when the twilight had disappeared," then he said straight after that: "And he would pray Fajr when a man could see clearly."  

كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي الظُّهْرَ إِذَا زَالَتِ الشَّمْسُ وَيُصَلِّي الْعَصْرَ بَيْنَ صَلاَتَيْكُمْ هَاتَيْنِ وَيُصَلِّي الْمَغْرِبَ إِذَا غَرَبَتِ الشَّمْسُ وَيُصَلِّي الْعِشَاءَ إِذَا غَابَ الشَّفَقُ ثُمَّ قَالَ عَلَى إِثْرِهِ وَيُصَلِّي الصُّبْحَ إِلَى أَنْ يَنْفَسِحَ الْبَصَرُ  

We asked Jabir about the time of the prayer of the Messenger of Allah ﷺ. He said: He used to offer the Zuhr prayer in the midday heat, the 'Asr prayer when the sun was bright, the Maghrib prayer when the sun had completely set, the Isha prayer early when many people were present, but late if there were few, and the Fajr prayer in the darkness (of the dawn).  

عَنْ وَقْتِ صَلاَةِ النَّبِيِّ ﷺ فَقَالَ كَانَ يُصَلِّي الظُّهْرَ بِالْهَاجِرَةِ وَالْعَصْرَ وَالشَّمْسُ حَيَّةٌ وَالْمَغْرِبَ إِذَا غَرَبَتِ الشَّمْسُ وَالْعِشَاءَ إِذَا كَثُرَ النَّاسُ عَجَّلَ وَإِذَا قَلُّوا أَخَّرَ وَالصُّبْحَ بِغَلَسٍ  

[Machine] On the authority of Abu Sadakah, the servant of Anas, Shu'bah praised him and said, "I asked Anas about the prayer of the Messenger of Allah ﷺ, and he said, 'The Messenger of Allah ﷺ used to pray Dhuhr when the sun passed its zenith, Asr between your prayer times (Dhuhr and Maghrib), Maghrib when the sun set, Isha' when the darkness disappeared, and Fajr when the dawn broke, until the true light appeared.'"  

عَنْ أَبِي صَدَقَةَ مَوْلَى أَنَسٍ وَأَثْنَى عَلَيْهِ شُعْبَةُ خَيْرًا قَالَ سَأَلْتُ أَنَسًا عَنْ صَلَاةِ رَسُولِ اللهِ ﷺ فَقَالَ كَانَ رَسُولُ اللهِ ﷺيُصَلِّي الظُّهْرَ إِذَا زَالَتِ الشَّمْسُ وَالْعَصْرَ بَيْنَ صَلَاتَيْكُمْ هَاتَيْنِ وَالْمَغْرِبَ إِذَا غَرَبَتِ الشَّمْسُ وَالْعِشَاءَ إِذَا غَابَ الشَّفَقُ وَالصُّبْحَ إِذَا طَلَعَ الْفَجْرُ إِلَى أَنْ يَنْفَسِحَ الْبَصَرُ