Surah Az-Zukhruf 43:4

وَإِنَّهُۥ فِىٓ أُمِّ ٱلْكِتَـٰبِ لَدَيْنَا لَعَلِىٌّ حَكِيمٌ

And indeed it is, in the Mother of the Book with Us, exalted and full of wisdom.

Translation: Saheeh International

Tafsir

And it is indeed fixed in the Mother Book the source of all the scriptures namely the Preserved Tablet which is with Us ladaynā substitutes for fī ummi’l-kitābi ‘in the Mother Book’ and it is indeed exalted above all the scriptures that came before it wise containing excellent wisdoms.

Excerpt from Tafsir al-Jalalayn, commentary on 43:4, via Quran.com. The reader has the full commentary and 9 more tafsirs.