The judge, Al-Moaafi bin Zakariyya, narrated from Hasan bin ALI Al-Asemi, from Suhaib, from his father, from JAAFAR BIN MOHAMMAD AL-SADIQ (ASWS), from his father, from ALI bin HUSAIN (ASWS), from his father, HUSAIN bin ALI BIN ABI TALEB (ASWS), who said:
The PROPHET (SAWW) was in Um Salaama's house when an angel, who had twenty heads, descended upon him. Each one of the angel’s heads had one thousand tongues, and he was praising ALLAH (SWT) with each tongue in a different language. His wings were larger than all of the seven heavens and the seven earths.
The PROPHET (SAWW) thought that he was Jibraeel so the PROPHET (SAWW) .said to him,“I have never seen you in this form.”
The angel said, “I am not Jibraeel. I am Sarsaeel. ALLAH (SWT) sent me to you to marry the light to the light.”
Then the PROPHET (SAWW) asked him, “Who do you mean?”
The angel said, “Your daughter, FATEMA (SAWS) , to ALI BIN ABI TALEB (ASWS).”
So the PROPHET (SAWW) married FATEMA (SAWS) to ALI (ASWS) with Jibraeel, Mikaeel, Israfil, and Sarsaeel as witnesses. Then the PROPHET (SAWW) looked and saw the following written between the shoulders of Sarsaeel:
LA ILAHA ILLALLAH (SWT). MOHAMMAD (SAWW) IS THE MESSENGER OF ALLAH (SWT) AND IS THE PROPHET (SAWW) WHO BRINGS MERCY ON PEOPLE. ALI (ASWS) IS THE DECISIVE PROOF THAT ALLAH (SWT) USES ON HIS CREATURES.
Then the PROPHET (SAWW) asked Sarsaeel, “How long have you had this written between your shoulders?”
Sarsaeel replied, “Twelve thousand years before ALLAH (SWT) created Adam.
(Ref : Bihar Volume No.3 Page No. 123 hadees No.31)