Surah At-Tawbah 9:129

فَإِن تَوَلَّوْا۟ فَقُلْ حَسْبِىَ ٱللَّهُ لَآ إِلَـٰهَ إِلَّا هُوَ ۖ عَلَيْهِ تَوَكَّلْتُ ۖ وَهُوَ رَبُّ ٱلْعَرْشِ ٱلْعَظِيمِ

But if they turn away, [O Muḥammad], say, "Sufficient for me is Allāh; there is no deity except Him. On Him I have relied, and He is the Lord of the Great Throne."

Translation: Saheeh International

Tafsir

So if they turn away refraining from believing in you say ‘God suffices me. There is no god except Him. Upon Him I rely in Him have I put my trust and in none other and He is the Lord of the Tremendous Throne’ al-‘arsh al-azīm the kursī which is singled out for mention because it is the greatest of all things created. …

Excerpt from Tafsir al-Jalalayn, commentary on 9:129, via Quran.com. The reader has the full commentary and 9 more tafsirs.