(66) باب ذَهَابِ الإِيمَانِ آخِرَ الزَّمَانِ
It is narrated on the authority of Anas that the Messenger of Allah (ﷺ) said:
"The Hour (Resurrection) will not occur as long as anyone says: 'Allah, Allah.'"
Reference: Sahih Muslim 148 b
In-book reference: Book 1, Hadith 283
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 274