Sahih Muslim , Hadith 148 ⓘ
It is narrated on the authority of Anas that verily the Messenger of Allah said: "The Hour (Resurrection) will not occur until 'Allah, Allah' is not said on earth."
حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا عَفَّانُ، حَدَّثَنَا حَمَّادٌ، أَخْبَرَنَا ثَابِتٌ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ تَقُومُ السَّاعَةُ حَتَّى لاَ يُقَالَ فِي الأَرْضِ اللَّهُ اللَّهُ " .
also referenced under: Book 1, Hadith 282 (In-Book) & Book 1, Hadith 273 (USC-MSA)
It is narrated on the authority of Anas that the Messenger of Allah said: "The Hour (Resurrection) will not occur as long as anyone says: 'Allah, Allah.'"
حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ تَقُومُ السَّاعَةُ عَلَى أَحَدٍ يَقُولُ اللَّهُ اللَّهُ " .
also referenced under: Book 1, Hadith 283 (In-Book) & Book 1, Hadith 274 (USC-MSA)