Az-Zukhruf • BN-TAFSEER-IBN-E-KASEER
﴿ وَإِنَّهُۥ فِىٓ أُمِّ ٱلْكِتَٰبِ لَدَيْنَا لَعَلِىٌّ حَكِيمٌ ﴾
“And, verily, [originating as it does] in the source, with Us, of all revelation, it is indeed sublime, full of wisdom.”
Please check ayah 43:8 for complete tafsir.