Period of Reveletion
There is no dispute about its being a Makki Sura. Its contents show that this too is one of the earliest Suras to be revealed at Makkah.
Theme and Subject Matter
Its theme is Resurrection and the Hereafter. At the outset
the people have been aroused and alarmed
saying: "The Great Disaster!What is the Great Disaster? And what do you know what the Great Disaster is?"Thus
after preparing the listeners for the news of the dreadful calamity
Resurrection has been depicted before them in two sentences
saying that on that Day people will be running about in confusion and bewilderment just like so many scattered moths around a light
and the mountains uprooted
will their cohesion and will fly about like carded wool. Then
it has been said that when Allah's Court is established in the Hereafter and the people are called upon to account for their deeds. The people whose good deeds are found to be heavier than their evil deeds
will be blessed with bliss and happiness
and the people whose good deeds are found to be lighter than their evil deeds
will be cast into the deep pit full of burning fire.