Surah Ar-Ra'd 13:39

يَمْحُوا۟ ٱللَّهُ مَا يَشَآءُ وَيُثْبِتُ ۖ وَعِندَهُۥٓ أُمُّ ٱلْكِتَـٰبِ

Allāh eliminates what He wills or confirms, and with Him is the Mother of the Book.

Translation: Saheeh International

Tafsir

God effaces of it the Book whatever He will and He fixes read yuthbit or yuthabbit therein whatever He will of rulings or other matters and with Him is the Mother of the Book its source of origin of which nothing is ever changed and which consists of what He inscribed in pre-eternity azal.

Excerpt from Tafsir al-Jalalayn, commentary on 13:39, via Quran.com. The reader has the full commentary and 9 more tafsirs.