"A man asked the Messenger of Allah ﷺ about the times of prayer. He said: 'Pray with me.' So he prayed Zuhr when the sun had passsed its zenith, 'Asr when the shadow of a thing was equal to its height, Maghrib when the sun had set and 'Isha' when the twilight had disappeared." He said: "Then he prayed Zuhr when the shadow of a man was equal in length to his height, 'Asr when the length of a man's shadow was twice his height, and Maghrib just before the twilight disappeared." (One of the narrators) 'Abdullah bin Al-Harith said: "then he said: 'With regard to 'Isha' I think it is up to one-third of the night.'" [1] [1] The speaker there is Thawr, who narrated it from 'Ata' from Jabir. (Using translation from Nasāʾī 504)  

سَأَلَ رَجُلٌ رَسُولَ اللهِ ﷺ عَنْ مَوَاقِيتِ الصَّلَاةِ فَقَالَ «صَلِّ مَعِي» فَصَلَّى الظُّهْرَ حِينَ زَاغَتِ الشَّمْسُ وَالْعَصْرَ حِينَ كَانَ فَيْءُ كُلِّ شَيْءٍ مِثْلَهُ وَالْمَغْرِبَ حِينَ غَابَتِ الشَّمْسُ وَالْعِشَاءَ حِينَ غَابَ الشَّفَقُ قَالَ «ثُمَّ صَلَّى الظُّهْرَ حِينَ كَانَ فَيْءُ الْإِنْسَانِ مِثْلَهُ وَالْعَصْرَ حِينَ كان فَيْءُ الْإِنْسَانِ مِثْلَيْهِ وَالْمَغْرِبَ حِينَ كَانَ قَبْلَ غَيْبُوبَةِ الشَّفَقِ» قَالَ عَبْدُ اللهِ بْنُ الْحَارِثِ قَالَ فِي الْعِشَاءِ أَرَى إِلَى ثُلُثِ اللَّيْلِ  

' The time between these two is the time for prayer.'" [1] Meaning Fajr, the morning prayer. [2] The Fajr prayer was elongated because the Prophet recited at length during the prayer, so that it ended just before sunrise. That defined the end of the time for Fajr, as the beginning of the time was defined by the moment when he started the first Rak'ah. (Using translation from Nasāʾī 513)  

أَنَّ جِبْرِيلَ أَتَى النَّبِيَّ ﷺ لِيُعَلِّمَهُ مَوَاقِيتَ الصَّلَاةِ فَتَقَدَّمَ جِبْرِيلُ وَرَسُولُ اللهِ ﷺ خَلْفَهُ وَالنَّاسُ خَلْفَ رَسُولِ اللهِ ﷺ فَصَلَّى الظُّهْرَ حِينَ زَالَتِ الشَّمْسُ وَأَتَاهُ حِينَ كَانَ ظِلُّ الرَّجُلِ مِثْلَ شَخْصِهِ فَصَنَعَ كَمَا صَنَعَ فَتَقَدَّمَ جِبْرِِيلُ وَالنَّبِيُّ ﷺ خَلْفَهُ وَالنَّاسُ خَلْفَ رَسُولِ اللهِ ﷺ فَصَلَّى الْعَصْرَ ثُمَّ أَتَاهُ حِينَ وَجَبَتِ الشَّمْسُ فَتَقَدَّمَ جِبْرِيلُ وَرَسُولُ اللهِ ﷺ خَلْفَهُ وَالنَّاسُ خَلْفَ رَسُولِ اللهِ ﷺ فَصَلَّى الْمَغْرِبَ ثُمَّ أَتَاهُ حِينَ غَابَ الشَّفَقُ فَتَقَدَّمَ جِبْرِيلُ وَرَسُولُ اللهِ ﷺ خَلْفَهُ وَالنَّاسُ خَلْفَ رَسُولِ اللهِ ﷺ فَصَلَّى الْعِشَاءَ ثُمَّ أَتَاهُ حِينَ انْشَقَّ الْفَجْرُ فَتَقَدَّمَ جِبْرِيلُ وَرَسُولُ اللهِ ﷺ خَلْفَهُ وَالنَّاسُ خَلْفَ رَسُولِ اللهِ ﷺ فَصَلَّى الْغَدَاةَ ثُمَّ أَتَاهُ الْيَوْمَ الثَّانِيَ حِينَ كَانَ ظِلُّ الرَّجُلِ مِثْلَ شَخْصِهِ فَصَنَعَ مِثْلَ مَا صَنَعَ بِالْأَمْسِ فَصَلَّى الظُّهْرَ ثُمَّ أَتَاهُ حِينَ كَانَ ظِلُّ الرَّجُلِ مِثْلَ شَخْصَيْهِ فَصَنَعَ كَمَا صَنَعَ بِالْأَمْسِ فَصَلَّى الْعَصْرَ ثُمَّ أَتَاهُ حِينَ وَجَبَتِ الشَّمْسُ فَصَنَعَ كَمَا صَنَعَ بِالْأَمْسِ فَصَلَّى الْمَغْرِبَ فَنِمْنَا ثُمَّ قُمْنَا ثُمَّ نِمْنَا ثُمَّ قُمْنَا فَأَتَاهُ فَصَنَعَ كَمَا صَنَعَ بِالْأَمْسِ فَصَلَّى الْعِشَاءَ ثُمَّ قَالَ «مَا بَيْنَ هَاتَيْنِ الصَّلَاتَيْنِ وَقْتٌ»  

"Jibril, peace be upon him, came to the Prophet ﷺ when the sun had passed its zenith and said: 'Get up, O Muhammad, and pray Zuhr when the sun has passed its zenith.' Then he waited until a man's shadow was equal to his height. Then he came to him for 'Asr and said: 'Get up, O Muhammad, and pray 'Asr.' Then he waited until the sunset, then he came to him and said: 'Get up, O Muhammad, and pray Maghrib.' So he got up and prayed it when the sun had set. Then he waited until the twilight disappeared, then he came to him and said: 'Get up, O Muhammad, and pray 'Isha'.' So he got up and prayed it. Then he came to him when dawn broke and said: 'Get up, O Muhammad, and pray.' So he got up and prayed Subh.' So he got up and prayed Subh. Then he came to him the next day when a man's shadow was equal to his height, and said: 'Get up, O Muhammad, and pray.' So he prayed Zuhr. Then Jibril came to him when a man's shadow was equal to twice his length and said: 'Get up, O Muhammad, and pray.' So he prayed 'Asr. Then he came to him for Maghrib when the sun set, at exactly the same time as the day before, and said: 'Get up, O Muhammad, and pray.' So he prayed Maghrib. Then he came to him for 'Isha' when the first third of the night had passed, and said: 'Get up and pray.' So he prayed 'Isha'. Then he came to him for Subh when it had become very bright, and said: 'Get up and pray.' So he prayed Subh. Then he said: 'The times of prayer one between those two (limits).'" (Using translation from Nasāʾī 526)  

جَاءَ جِبْرِيلُ إِلَى النَّبِيِّ ﷺ حِينَ مَالَتِ الشَّمْسُ فَقَالَ قُمْ يَا مُحَمَّدُ فَصَلَّى الظُّهْرَ حِينَ مَالَتِ الشَّمْسُ ثُمَّ مَكَثَ حَتَّى إِذَا كَانَ فَيْءُ الرَّجُلِ مِثْلَهُ جَاءَهُ لِلْعَصْرِ فَقَالَ قُمْ يَا مُحَمَّدُ فَصَلَّى الْعَصْرَ ثُمَّ مَكَثَ حَتَّى إِذَا غَابَتِ الشَّمْسُ جَاءَهُ فَقَالَ قُمْ فَصَلِّ الْمَغْرِبَ فَقَامَ فَصَلَّاهَا حِينَ غَابَتِ الشَّمْسُ سَوَاءً ثُمَّ مَكَثَ حَتَّى إِذَا غَابَ الشَّفَقُ جَاءَهُ فَقَالَ قُمْ فَصَلِّ الْعِشَاءَ فَقَامَ فَصَلَّاهَا ثُمَّ جَاءَهُ حِينَ سَطَعَ الْفَجْرُ بِالصُّبْحِ فَقَالَ قُمْ يَا مُحَمَّدُ فَصَلِّ فَقَامَ فَصَلَّى الصُّبْحَ ثُمَّ جَاءَهُ مِنَ الْغَدِ حِينَ كَانَ فَيْءُ الرَّجُلِ مِثْلَهُ فَقَالَ قُمْ يَا مُحَمَّدُ فَصَلِّ فَصَلَّى الظُّهْرُ ثُمَّ جَاءَهُ حِينَ كَانَ فَيْءُ الرَّجُلِ مِثْلَيْهِ فَقَالَ قُمْ يَا مُحَمَّدُ فَصَلِّ الْعَصْرَ ثُمَّ جَاءَهُ لِلْمَغْرِبِ حِينَ غَابَتِ الشَّمْسُ وَقْتًا وَاحِدًا لَمْ يَزَلْ عَنْهُ فَقَالَ قُمْ فَصَلِّ فَصَلَّى الْمَغْرِبَ ثُمَّ جَاءَهُ لِلْعِشَاءِ حِينَ ذَهَبَ ثُلُثُ اللَّيْلِ الْأَوَّلُ فَقَالَ قُمْ فَصَلِّ فَصَلَّى الْعِشَاءَ ثُمَّ جَاءَهُ لِلصُّبْحِ حِينَ أَسْفَرَ جِدًّا فَقَالَ قُمْ فَصَلِّ فَصَلَّى الصُّبْحَ ثُمَّ قَالَ «مَا بَيْنَ هَذَيْنِ وَقْتٌ كُلُّهُ»