Silsilah as-Sahihah 3688 — The Hour Cannot Occur While Tawheed Exists

Sayyiduna Anas (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "The Hour will not be established upon a person who says: 'Allah, Allah' (and in another narration: who says «لا اله الا الله»)."