Quran 26:24 from Surah Ash-Shu'araa on Divine Marvels.
قَالَ رَبُّ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِ وَمَا بَيۡنَهُمَآۖ إِن كُنتُم مُّوقِنِينَ
English translation: He said Lord (of) the heavens and the earth and whatever (is) between them if you (should) be convinced
Transliteration: qala rabbu al-samawati wal-ardi wama baynahuma in kuntum muqinina