Surah An-Nazi'at, Verse 27

ءَأَنتُمۡ أَشَدُّ خَلۡقًا أَمِ ٱلسَّمَآءُۚ بَنَىٰهَا٢٧

a-antum ashaddu khalqan ami l-samāu banāhā

Are you a more difficult creation or is the heaven? He [i.e., Allāh] constructed it.