18. Al-Kahf (The Cave)

Surah: 18   Aya: 14

14. Warabatna AAala quloobihim ith qamoo faqaloo rabbuna rabbu alssamawati waal-ardi lan nadAAuwa min doonihi ilahan laqad qulna ithan shatatan
  

  Translation

14. And We made their hearts firm and strong (with the light of Faith in Allâh and bestowed upon them patience to bear the separation of their kith and kin and dwellings, etc.) when they stood up and said: "Our Lord is the Lord of the heavens and the earth, never shall we call upon any ilâh (god) other than Him; if we did, we should indeed have uttered an enormity in disbelief.