Qur'ān 3:85 · Aal-i-Imran (آل عمران)

وَمَن يَبْتَغِ غَيْرَ ٱلْإِسْلَـٰمِ دِينًۭا فَلَن يُقْبَلَ مِنْهُ وَهُوَ فِى ٱلْـَٔاخِرَةِ مِنَ ٱلْخَـٰسِرِينَ

And whoever desires other than Islam as religion - never will it be accepted from him, and he, in the Hereafter, will be among the losers.