Islamic world

 Koran, surah XVIII "Al Kahf" (The Cave)

 The Christian tale of the Seven Sleepers flowed into Koran in the first verses  (9-26) of the surah XVIII, named Al Kahf.

 The Seven Sleepers became "Ahl al kahf", that is "the people of the cave" or "Ashab al kahf", that is "the Companions of the cave".

 The Islamic version differs from the Christian legend in some details. Some of them are:

 1. The number of the years they slept before the resurrection.

 2. The presence of a dog. (link)

 3. The uncertainity of the number of the sleepers.