The Messenger of Allah ﷺ said, "The Hour will not come until no one on earth says, 'Allah, Allah.'"
حدثنا محمد بن بشار حدثنا ابن أبي عدي عن حميد
قال رسول الله ﷺ لا تقوم الساعة حتى لا يقال في الأرض الله الله
[Sahih]. Ahmad recorded it: 3/107, no. 12066, from Muhammad bin Abu Adi with the same chain. Muslim also narrated it, no. 148, from the hadith of Thabit, from Anas, with the same chain.