MOST of the authorities are of the opinion that this surah is one of the last to have been revealed in Mecca, while some maintain that it is one of the earliest Medina revelations. Others again assert that while the main body of the surah is Meccan, the first ten or eleven verses were revealed at Medina. And, finally, there are some scholars who hold the opposite view, ascribing the first nine verses to Mecca, and the rest to Medina. On the whole, it would seem that, historically, the surah marks the transition between the Mecca and Medina periods. The title has been derived from the parable of "the spider's house" in verse 41, a symbol of false beliefs and false values, which in the long run are bound to be blown away by the winds of truth.