It is narrated on the authority of Ibn 'Umar ('Abdullah bin '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.
Hadith Referenceصحيح مسلم / كتاب الإيمان / 146
Hadith Gradingمحدثین:أحاديث صحيح مسلم كلها صحيحة
Hadith Takhrij«أحاديث صحيح مسلم كلها صحيحة ، انفرد به مسلم - انظر ((التحفة)) برقم (7430)»
This hadith has been narrated on the authority of Ibn 'Umar (peace be upon him) as saying: "Five (are the beasts) in killing which or their being killed in the precinct of the Ka’bah there is no sin." The rest of the hadith is the same.