This Surah takes its name from v. 9 in which the word (al-kahf) occurs.
Period of Revelation
This is the first of those Surahs which were sent down in the third stage of Prophethood at Makkah. We have already divided the life of the Holy Prophet at Makkah into four stages in the Introduction to Chapter VI. According to that division the third stage lasted from the fifth to the tenth year of Prophethood. What distinguishes this stage from the second and the fourth stages is this. During the second stage the Quraish mainly resorted to ridiculing, scoffing, threatening, tempting, raising objections and making false propaganda against the Holy Prophet and his followers in order to suppress the Islamic Movement. But during the third stage they employed the weapons of persecution, man handling and economic pressure for the same purpose. So much so that a large number of the Muslims had to emigrate from Arabia to Habash, and those who remained behind were besieged in Shi'ib Abi Talib along with the Holy Prophet and his family. To add to their misery, a complete social and economic boycott was applied against them. The only redeeming feature was that there were two personalities, Abu Talib and Hadrat Khadijah, whose personal influence had been conducive to the support of two great families of the Quraish. However, when in the tenth year of Prophethood these two persons died, the fourth stage began with such revere persecutions as forced the Holy Prophet and all his Companions to emigrate from Makkah.
It appears from the theme of the Surah that it was revealed at the beginning of the third stage when in spite of persecutions and opposition, migration to Habash had not yet taken place. That is why the story of "Ashab-i-Kahf " (the Sleepers of the Cave) has been related to comfort and encourage the persecuted Muslims and to show them how the righteous people have been saving their Faith in the past.
Subject and Topics
This Surah was sent down in answer to the three questions which the mushriks of Makkah, in consultation with the people of the Book, had put to the Holy Prophet in order to test him. These were: (1) Who were "the Sleepers of' the Cave"? (2) What is the real story of Khidr? and (3) What do you know about Zul-Qarnain? As these three questions and the stories involved concerned the history of the Christians and the Jews, and were unknown in Hijaz, a choice of these was made to test whether the Holy Prophet possessed any source of the knowledge of the hidden and unseen things.
English Translation: Noor International