(3) باب اتِّبَاعِ سُنَنِ الْيَهُودِ وَالنَّصَارَى
Abu Sa'id al-Khudri reported Allah's Messenger (ﷺ) as saying:
You would tread the same path as was trodden by those before you inch by inch and step by step so much so that if they had entered into the hole of the lizard, you would follow them in this also. We said: Allah's Messenger, do you mean Jews and Christians (by your words)" those before you"? He said: Who else (than those two religious groups)?
Reference: Sahih Muslim 2669 a
In-book reference: Book 47, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Book 34, Hadith 6448