Al-Kahf 14

وَرَبَطْنَا عَلَىٰ قُلُوبِهِمْ إِذْ قَامُوا۟ فَقَالُوا۟ رَبُّنَا رَبُّ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ لَن نَّدْعُوَا۟ مِن دُونِهِۦٓ إِلَٰهًا لَّقَدْ قُلْنَآ إِذًا شَطَطًا ﴿١٤﴾

Warabatna AAala quloobihim ith qamoo faqaloo rabbuna rabbu alssamawati waalardi lan nadAAuwa min doonihi ilahan laqad qulna ithan shatatan

And We made their hearts firm and strong (with the light of Faith in Allah 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 ilah (god) other than Him; if we did, we should indeed have uttered an enormity in disbelief. The Noble Quran