It is narrated on the authority of Ibn 'Umar ('Abdullah b. 'Umar) that the Messenger of Allah (ﷺ) observed:
Verily Islam started as something strange and it would again revert (to its old position) of being strange just as it started, and it would recede between the two mosques just as the serpent crawls back into its hole.
Reference: Sahih Muslim 146 In-book : Book 1, Hadith 280 USC-MSA web (English) : Book 1, Hadith 271 (deprecated)
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