Sahih Muslim Book - 5, Hadith - 1386

حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِىُّ حَدَّثَنَا أَبِى حَدَّثَنَا شُعْبَةُ عَنْ قَتَادَةَ عَنْ أَبِى أَيُّوبَ - وَاسْمُهُ يَحْيَى بْنُ مَالِكٍ الأَزْدِىُّ وَيُقَالُ الْمَرَاغِىُّ وَالْمَرَاغُ حَىٌّ مِنَ الأَزْدِ - عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو عَنِ النَّبِىِّ -صلى الله عليه وسلم- قَالَ « وَقْتُ الظُّهْرِ مَا لَمْ يَحْضُرِ الْعَصْرُ وَوَقْتُ الْعَصْرِ مَا لَمْ تَصْفَرَّ الشَّمْسُ وَوَقْتُ الْمَغْرِبِ مَا لَمْ يَسْقُطْ ثَوْرُ الشَّفَقِ وَوَقْتُ الْعِشَاءِ إِلَى نِصْفِ اللَّيْلِ وَوَقْتُ الْفَجْرِ مَا لَمْ تَطْلُعِ الشَّمْسُ ».

It was narrated from 'Abdullah bin 'Amr that the Prophet (s.a.w) said: "The time for Zuhr is so long as 'Asr has not come. The time for 'Asr is so long as the sun has not turned yellow. The time for Maghrib is so long as the twilight has not disappeared. The time for 'Isha' is so long as half of the night has not passed. The time for Fajr is so long as the sun has not risen."