Holy Quran » ALI 'IMRAN : 85

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وَمَن يَبْتَغِ غَيْرَ الإِسْلاَمِ دِينًا فَلَن يُقْبَلَ مِنْهُ وَهُوَ فِي الآخِرَةِ مِنَ الْخَاسِرِينَ

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.

Tafseer

{ ومن يبتغ غير الإسلام دينا فلن يقبل منه وهو في الآخرة من الخاسرين } لمصيره إلى النار المؤبدة علية .

It seeks a religion other than Islam, it will never be accepted of him in the Hereafter for his fate to the fire for life attic.