We tell you this story for a genuine purpose. They were young people who believed in their Lord and We gave them further guidance. 13 And We braced their hearts when they stood forth and said: our Lord is the Lord of the heavens and the earth; never we shall call upon a god beside him; for then we shall be saying an abomination. 14 These, our people, have chosen (other) gods beside Him though they bring no clear warrant (vouchsafed) to them. And who doth greater wrong than he who inventeth a lie concerning Allah? 15 And when ye withdraw from them and that which they worship except Allah, then seek refuge in the Cave; your Lord will spread for you of His mercy and will prepare for you a pillow in your plight. 16 ۞ The sun could be observed to incline away from their cave on the right, as it rose, and to turn away from them on the left, when it set, while they lay in the wide space inside the cave. This is one of the signs of God. He whom God guides is rightly guided; but for him whom He lets go astray, you will find no helper or guide. 17