Surah Az-Zukhruf 43:9

وَلَئِن سَأَلْتَهُم مَّنْ خَلَقَ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضَ لَيَقُولُنَّ خَلَقَهُنَّ ٱلْعَزِيزُ ٱلْعَلِيمُ

And if you should ask them, "Who has created the heavens and the earth?" they would surely say, "They were created by the Exalted in Might, the Knowing,"

Translation: Saheeh International

Tafsir

And if wa-la-in the lām is for oaths you ask them ‘Who created the heavens and the earth?’ they will surely say the indicative nūn has been omitted because of the other nūn coming after it and likewise the wāw replaced by the damma in -lunna because of two unvowelled consonants coming together ‘The Mighty the Knower …

Excerpt from Tafsir al-Jalalayn, commentary on 43:9, via Quran.com. The reader has the full commentary and 9 more tafsirs.