The throng, the chiefs, and the priests sat watching the fire from a distance. It was burning their faces and nearly suffocating them. It kept burning for such a long time that the disbelievers thought it would never be extinguished.
When it did burn out, they were greatly amazed to find Abraham coming out of the pit untouched by the fire. Their faces were black from the smoke, but his was bright with the light and grace of Allah. The raging fire had become cool for Abraham and had only charred the ropes which held him. He walked out of the fire as if he were walking out of a garden. Cries of astonishment were heard from the heathens. They wanted to harm him, but We made them the worst losers. Surah 21:70
This miracle shamed the tyrants, but it did not cool the flame of anger in their hearts. However, after this event many of the people followed Abraham, although some kept their belief a secret for fear of harm or death at the hands of the rulers.