"I heard Allah’s Messenger (Allah bless him and give him peace)- and if I wished to kiss the seal between his shoulders, I would do so because of his nearness— say to Sa'd ibn Mu'adh on the day he died: “The Throne of the
All-Merciful was shaken on his account!”
Narrated Ibrahim ibn Muhammad, one of the offspring of 'Ali ibn Abi Talib, told me:
“When 'Ali described Allah’s Messenger (Allah bless him and give him peace)— then he related the tradition in full—he said: 'Between his shoulders was the Seal of Prophethood, for he is the Seal of the Prophets'."
‘My maternal aunt took me to the Prophet (Allah bless him and give him peace), and she said; “O Messenger of Allah, my sister's son is in pain!” He therefore stroked my head (Allah bless him and give him peace) and supplicated blessing for my sake. He performed the minor ritual ablution. I drank from his ablution water and stood behind his back, whereupon I observed the Seal between his shoulders, and lo and behold, it was like the button of the bridal canopy!”’