Sura Āl-ʿImrān 3:19

إِنَّ ٱلدِّينَ عِندَ ٱللَّـهِ ٱلْإِسْلَٰمُ وَمَا ٱخْتَلَفَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ إِلَّا مِنۢ بَعْدِ مَا جَآءَهُمُ ٱلْعِلْمُ بَغْيًۢا بَيْنَهُمْ وَمَن يَكْفُرْ بِـَٔايَٰتِ ٱللَّـهِ فَإِنَّ ٱللَّـهَ سَرِيعُ ٱلْحِسَابِ

inna l-dīna ʿinda allāhi l-islāmu wa-mā ikhtalafa lladhīna ūtū l-kitāba illā min baʿdi mā jāʾahumu l-ʿilmu baghyan baynahum wa-man yakfur bi-āyāti allāhi fa-inna allāha sarīʿu l-ḥisābi

The Religion before Allah is Islam (submission to His Will): Nor did the People of the Book dissent therefrom except through envy of each other, after knowledge had come to them. But if any deny the Signs of Allah, Allah is swift in calling to account.