Surah Al-Furqan 25:59

ٱلَّذِى خَلَقَ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضَ وَمَا بَيْنَهُمَا فِى سِتَّةِ أَيَّامٍ ثُمَّ ٱسْتَوَىٰ عَلَى ٱلْعَرْشِ ۚ ٱلرَّحْمَـٰنُ فَسْـَٔلْ بِهِۦ خَبِيرًا

He who created the heavens and the earth and what is between them in six days and then established Himself above the Throne - the Most Merciful, so ask about Him one well informed [i.e., the Prophet (ﷺ)].

Translation: Saheeh International

Tafsir

He it is Who created the heavens and the earth and all that is between them in six days of the length of the days of this world since there was no sun at that point — had He willed He could have created them in an instant but His not having done so is because He will to teach His creatures to be circumspect — then …

Excerpt from Tafsir al-Jalalayn, commentary on 25:59, via Quran.com. The reader has the full commentary and 9 more tafsirs.