Sahih Bukhari Volume 1, Book 9, Hadith 541

حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي الْمِنْهَالِ، عَنْ أَبِي بَرْزَةَ، كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي الصُّبْحَ وَأَحَدُنَا يَعْرِفُ جَلِيسَهُ، وَيَقْرَأُ فِيهَا مَا بَيْنَ السِّتِّينَ إِلَى الْمِائَةِ، وَيُصَلِّي الظُّهْرَ إِذَا زَالَتِ الشَّمْسُ، وَالْعَصْرَ وَأَحَدُنَا يَذْهَبُ إِلَى أَقْصَى الْمَدِينَةِ ثُمَّ يَرْجِعُ وَالشَّمْسُ حَيَّةٌ، وَنَسِيتُ مَا قَالَ فِي الْمَغْرِبِ، وَلاَ يُبَالِي بِتَأْخِيرِ الْعِشَاءِ إِلَى ثُلُثِ اللَّيْلِ‏.‏ ثُمَّ قَالَ إِلَى شَطْرِ اللَّيْلِ‏.‏ وَقَالَ مُعَاذٌ قَالَ شُعْبَةُ ثُمَّ لَقِيتُهُ مَرَّةً فَقَالَ أَوْ ثُلُثِ اللَّيْلِ

Narrated By Abu Al-Minhal : Abu Barza said, "The Prophet used to offer the Fajr (prayer) when one could recognize the person sitting by him (after the prayer) and he used to recite between 60 to 100 Ayat (verses) of the Qur'an. He used to offer the Zuhr prayer as soon as the sun declined (at noon) and the 'Asr at a time when a man might go and return from the farthest place in Medina and find the sun still hot. (The sub-narrator forgot what was said about the Maghrib). He did not mind delaying the 'Isha prayer to one third of the night or the middle of the night."