(V.26:214) Narrated Ibn ‘Abbâs رضي الله عنهما: When the Verse: "And warn your tribe (O Muhammad صلى الله عليه وسلم) of near kindred." (V.26:214) was revealed, Allâh’s Messenger صلى الله عليه وسلم went out, and when he had ascended As-Safa mountain, he shouted, "Yâ Sabâhâh!*" The people said, "Who is that?" "Then they gathered around him, whereupon he said, "Do you see? If I inform you that cavalrymen are proceeding up the side of this mountain, will you believe me?" They said, "We have never heard you telling a lie." Then he said, "I am a plain warner to you of a coming severe punishment." Abû Lahab said: "May you perish! You gathered us only for this reason?" Then Abû Lahab went away. So Sûrat Al-Masad "Perish the hands of Abû Lahab!" (V.111:1) was revealed. (Sahih Al-Bukhari, Vol.6, Hadîth No.495).
* "Yâ Sabâhâh!" is an Arabic expression used when one appeals for help or draws the attention of others to some danger.