Surah Ali 'Imran — Ayah 85 (3:85)
وَمَن يَبۡتَغِ غَيۡرَ ٱلۡإِسۡلَٰمِ دِينٗا فَلَن يُقۡبَلَ مِنۡهُ وَهُوَ فِي ٱلۡأٓخِرَةِ مِنَ ٱلۡخَٰسِرِينَ ٨٥
English translation (Saheeh International)
And whoever desires other than Islām as religion - never will it be accepted from him, and he, in the Hereafter, will be among the losers.
Brief commentary
Whoever seeks a path other than that which Allah has endorsed – the path of surrendering (Islam) – it will not be accepted from them by Allah. They will be of those who have lost their souls by entering the fire of Hell.