Quran 21:32 from Surah Al-Anbiyaa on Divine Marvels.
وَجَعَلۡنَا ٱلسَّمَآءَ سَقۡفٗا مَّحۡفُوظٗاۖ وَهُمۡ عَنۡ ءَايَٰتِهَا مُعۡرِضُونَ
English translation: And We made the sky a roof protected But they from its Signs turn away
Transliteration: waja'alna al-samaa saqfan mahfuzan wahum an ayatiha mu'riduna