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? Narrated Az-Zuhri that he visited Anas bin Malik at Damascus and found him weeping and asked him why he was weeping. He replied, "I do not know anything which I used to know during the life-time of Allah's Apostle except this prayer which is being lost (not offered as it should be)."
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.
• Sahih al-Bukhari, 530
• Sahih al-Bukhari, Vol. 1, Book of Times of the Prayer and Its Superiority, Hadith 507
• Sahih al-Bukhari, Book of Times of the Prayer and Its Superiority, Hadith 507