It is reported on the authority of Ibn 'Abbas that when this verse was revealed:
"And warn thy nearest kindred" (and thy group of selected people among them) the Messenger of Allah (may peace be upon him) set off till he climbed Safa' and called loudly: Be on your guard!
They said: Who is it calling aloud?
They said: Muhammad.
They gathered round him, and he said: O sons of so and so, O sons of so and so, O sons of 'Abd Manaf, O sons of 'Abd al-Muttalib, and they gathered around him.
He (the Apostle) said: If I were to inform you that there were horsemen emerging out of the foot of this mountain, would you believe me?
They said: We have not experienced any lie from you.
He said: Well, I am a warner to you before a severe torment.
He (the narrator) said that Abu Lahab then said: Destruction to you! Is it for this you have gathered us?
He (the Holy Prophet) then stood up, and this verse was revealed: "Perish the hands of Abu Lahab, and he indeed perished" (cxi. 1).
A'mash recited this to the end of the Sura.