Surah Ad-Dukhan 44:7

رَبِّ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ وَمَا بَيْنَهُمَآ ۖ إِن كُنتُم مُّوقِنِينَ

Lord of the heavens and the earth and that between them, if you would be certain.

Translation: Saheeh International

Tafsir

Lord of the heavens and the earth and all that is between them read rabbu’l-samāwāti in the nominative to understand it as a third predicate; or read rabbi’l-samāwāti as a substitution for rabbika ‘your Lord’ if you should be certain O people of Mecca that God exalted be He is the Lord of the heavens and the earth …

Excerpt from Tafsir al-Jalalayn, commentary on 44:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.