Sahih Bukhari Volume 1, Book 9, Hadith 569

حَدَّثَنَا أَيُّوبُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنِي أَبُو بَكْرٍ، عَنْ سُلَيْمَانَ، قَالَ صَالِحُ بْنُ كَيْسَانَ أَخْبَرَنِي ابْنُ شِهَابٍ، عَنْ عُرْوَةَ، أَنَّ عَائِشَةَ، قَالَتْ أَعْتَمَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِالْعِشَاءِ حَتَّى نَادَاهُ عُمَرُ الصَّلاَةَ، نَامَ النِّسَاءُ وَالصِّبْيَانُ‏.‏ فَخَرَجَ فَقَالَ ‏"‏ مَا يَنْتَظِرُهَا أَحَدٌ مِنْ أَهْلِ الأَرْضِ غَيْرُكُمْ ‏"‏‏.‏ قَالَ وَلاَ يُصَلَّى يَوْمَئِذٍ إِلاَّ بِالْمَدِينَةِ، وَكَانُوا يُصَلُّونَ فِيمَا بَيْنَ أَنْ يَغِيبَ الشَّفَقُ إِلَى ثُلُثِ اللَّيْلِ الأَوَّلِ

Narrated By Ibn Shihab from 'Urwa : 'Aisha said, "Once Allah's Apostle delayed the 'Isha prayer till 'Umar reminded him by saying, "The prayer!" The women and children have slept. Then the Prophet came out and said, 'None amongst the dwellers of the earth has been waiting for it (the prayer) except you." Urwa said, "Nowhere except in Medina the prayer used to be offered (in those days)." He further said, "The Prophet used to offer the 'Isha prayer in the period between the disappearance of the twilight and the end of the first third of the night."