Al-Qalam (The Pen)

This Surah is called Nun as well as Al-Qalam, the words with which it begins.

This too is one of the earliest surahs to be revealed at Makkah, but its subject matter shows that it was sent down at the time when opposition to the Holy Prophet (upon whom be peace) had grown very harsh and tyrannical....

It consists of three themes: Replies to the opponents objections, administration of warning and admonition to them, and exhortation to the Holy Prophet (upon whom be peace) to patience and constancy....