It is We who relate to you, [O Muhammad], their story in truth. Indeed, they were youths who believed in their Lord, and We increased them in guidance. 13 and strengthened their hearts when they stood up and proclaimed: "Our Lord is the Lord of the heavens and the earth. We shall call upon no other god beside Him; (for if we did so), we shall be uttering a blasphemy." 14 These, our people, have taken besides Him deities. Why do they not bring for [worship of] them a clear authority? And who is more unjust than one who invents about Allah a lie?" 15 And when you forsake them and what they worship save Allah, betake yourselves for refuge to the cave; your Lord will extend to you largely of His mercy and provide for you a profitable course in your affair. 16 ۞ And thou mightest have seen the sun, when it rose, inclining from their Cave towards the right, and, when it set, passing them by on the left, while they were in a broad fissure of the Cave. That was one of God's signs; whomsoever God guides, he is rightly guided, and whomsoever He leads astray, thou wilt not find for him a protector to direct. 17