The Messenger of Allah ﷺ said, "The Hour will not come until it is no longer said on earth, 'Allah, Allah.'"
أن رسول الله ﷺ قال: لا تقوم الساعة حتى لا يقال في الأرض: الله الله.
Muslim narrated it in the Book of Faith (148:234), from Zuhayr bin Harb, who said, Hammad narrated to us, Thabit informed us, from Anas, and he mentioned it.Ahmad also narrated it (13833), from Affan, from Hammad, through the same chain, but in his version it reads, "There is no god but Allah," instead of, "Allah, Allah."