عَنْ أَبِي سَعِيدٍ الْخُدْرِيّ عَنِ النَّبِيّ صَلَّى اللّٰهُ عَلَيْهِ وَسَلَّم قَالَ: لَتَتْبَعُنَّ سَنَنَ مَنْ كَانَ قَبْلَكُمْ شِبْرًا شِبْرًا وَذِرَاعًا بِذِرَاعٍ، حَتَّى لَوْ دَخَلُوا جُحْرَ ضَبّ تَبِعْتُمُوهُمْ. قُلْنَا يَا رَسُولَ اللّٰهِ الْيَهُودُ وَالنَّصَارَى قَالَ: فَمَنْ.
It is narrated by Hazrat Abu Sa‘id al-Khudrira, “The Prophetsa said, ‘You will follow the ways of those nations who were before you, span by span and cubit by cubit so much so that even if they entered a hole of a mastigure, you would follow them.’ We said, ‘O Allah’s Messengersa! (Do you mean) the Jews and the Christians?’ He said, ‘Whom else?’”
(Sahih al-Bukhari, Kitab al-i‘tisami bi l-kitabi wa s-sunnah, Hadith 7320)