Sahih al-Bukhari 529
Sahih al-Bukhari · Book 9: Times of the Prayers · Not offering As-Salat (the prayers) at its stated fixed time
Narrated Ghailan:
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ ، قَالَ حَدَّثَنَا مَهْدِيٌّ ، عَنْ غَيْلاَنَ ، عَنْ أَنَسٍ ، قَالَ مَا أَعْرِفُ شَيْئًا مِمَّا كَانَ عَلَى عَهْدِ النَّبِيِّ صلى الله عليه وسلم. قِيلَ الصَّلاَةُ. قَالَ أَلَيْسَ ضَيَّعْتُمْ مَا ضَيَّعْتُمْ فِيهَا.
Anas said, "I do not find (now-a-days) things as they were (practiced) at the time of the Prophet." Somebody said "The prayer (is as it was.)" Anas said, "Have you not done in the prayer what you have done?