Al-Simāt Supplication or duʿā al-Simāt (Arabic:دعاء السمات) is a supplication narrated from Imam al-Baqir (a) which is recommended to be recited in the last hours of Friday. According to a narration from Imam al-Baqir (a), the Great Name of Allah is mentioned in this supplication. Shi'a scholars have written many commentaries on this supplication.