All nature is convulsed at the imputation that the Merciful has begotten a son.

This revelation is only to warn mankind by the example of the generations who have passed away.

Chapter XVIII.

Sūratu ʾl-Kahf.

The Chapter of the Cave.

The Qurʾān is a warning especially to those who say God has begotten a son.

Muḥammad is not to grieve if they refuse to believe.

Story of the Fellows of the Cave.

Their number known only to God.

Muḥammad rebuked for promising a revelation on the subject.