"From Anas bin Malik who said : 'I do not recognize anything (today) from what we were upon during the time of The Messenger of Allah ﷺ.' So I said : 'What about the Salat?' He said: 'Have you (people) not done what you know (you have done)?'" Other chains report similar narrations.  

مَا أَعْرِفُ شَيْئًا مِمَّا كُنَّا عَلَيْهِ عَلَى عَهْدِ النَّبِيِّ ﷺ فَقُلْتُ أَيْنَ الصَّلاَةُ قَالَ أَوَلَمْ تَصْنَعُوا فِي صَلاَتِكُمْ مَا قَدْ عَلِمْتُمْ  

"What an evil servant is the one who fancies himself and becomes vain forgetting the Most Great, the Most High. What an evil servant is the one who forces and behaves hostility, forgetting the Compeller, the Most High. What an evil servant is the one who is heedless and diverted, forgetting about the graves and the trials. What an evil servant is the one who is violent and tyrannical, forgetting his beginnings or his end. What an evil servant is the one who seeks the world through the religion. What an evil servant is the one who seeks the religion through his desires. What an evil servant is the one who puts all hope in his own zeal. What an evil servant is the worshipper who is misled by his desire. What an evil servant is the one whose aspirations humiliate him."  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ بِئْسَ الْعَبْدُ عَبْدٌ تَخَيَّلَ وَاخْتَالَ وَنَسِيَ الْكَبِيرَ الْمُتَعَالِ بِئْسَ الْعَبْدُ عَبْدٌ تَجَبَّرَ وَاعْتَدَى وَنَسِيَ الْجَبَّارَ الأَعْلَى بِئْسَ الْعَبْدُ عَبْدٌ سَهَا وَلَهَا وَنَسِيَ الْمَقَابِرَ وَالْبِلَى بِئْسَ الْعَبْدُ عَبْدٌ عَتَا وَطَغَى وَنَسِيَ الْمُبْتَدَا وَالْمُنْتَهَى بِئْسَ الْعَبْدُ عَبْدٌ يَخْتِلُ الدُّنْيَا بِالدِّينِ بِئْسَ الْعَبْدُ عَبْدٌ يَخْتِلُ الدِّينَ بِالشُّبُهَاتِ بِئْسَ الْعَبْدُ عَبْدٌ طَمَعٌ يَقُودُهُ بِئْسَ الْعَبْدُ عَبْدٌ هَوًى يُضِلُّهُ بِئْسَ الْعَبْدُ عَبْدٌ رَغَبٌ يُذِلُّهُ