Allah, the Most Majestic, the Most gracious, has sent me to...

Allah, the Most Majestic, the Most gracious, has sent me to join in marriage the light with the light.” He then asked, “Who with who?” The angel said, “Fatima and Ali (a.s.).” The Imam (a.s.) said, “When the angel turned back on his shoulder it said, “Muhammad the Messenger of Allah, and Ali (a.s.) the executor of his will.” The Messenger of Allah asked, “Since when this has been written on your shoulder?” The angel replied, “It was there twenty two thousand year before Allah created Adam.”

يخرجه - Shaykh Baqir al-Behbudi (Sahih al-Kafi) شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/347))