يَمْحُوا۟ ٱللَّهُ مَا يَشَآءُ وَيُثْبِتُ ۖ وَعِندَهُۥٓ أُمُّ ٱلْكِتَـٰبِ
Yamhul laahu maa yashaaa'u wa yusbitu wa 'indahooo ummul Kitaab
God erases or confirms whatever He will, and the source of Scripture is with Him.
God erases what he wills and confirms what he wills, and with him is the source of the Book.
The closing phrase, umm al-kitāb, occurs three times and carries a different sense in each place: at 3:7 it names the clear verses that anchor the ambiguous ones, at 43:4 the Book kept with God. Commentators divide over what is erased here — rulings superseded by later ones, or the record of what a person's life will hold. The verse settles neither.