The writer of these lines heard another moving explanation of the black clot removal related from the great Imam Ahmad Rida Khan, namely, that the clot consisted in the portion of the disbelievers at whose eternal doom, had it not been removed, the Prophet (upon him blessings and peace) would have felt unbearable mercy on the Day of Judgment because he was created and sent as a mercy for the universes. Even so, the Prophet shall include them in his intercession at the time all creatures stand in wait under the sun for the Judgment to begin! So Blessings and peace on the Prophet, his Family, and his Companions until the end of time and for all eternity. --- This is from GF Haddad. Where did Alahazrat write this?