The Family of Imran
وَمَن يَبْتَغِ غَيْرَ ٱلْإِسْلَـٰمِ دِينًا 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.
Nearby ayahs help place verse 3:85 in sequence and meaning.
أَفَغَيْرَ دِينِ ٱللَّهِ يَبْغُونَ وَلَهُۥٓ أَسْلَمَ مَن فِى ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ طَوْعًا وَكَرْهًا وَإِلَيْهِ يُرْجَعُونَ
So is it other than the religion of Allah they desire, while to Him have submitted [all] those within the heavens and earth, willingly or by compulsion, and to Him they will be returned?
قُلْ ءَامَنَّا بِٱللَّهِ وَمَآ أُنزِلَ عَلَيْنَا وَمَآ أُنزِلَ عَلَىٰٓ إِبْرَٰهِيمَ وَإِسْمَـٰعِيلَ وَإِسْحَـٰقَ وَيَعْقُوبَ وَٱلْأَسْبَاطِ وَمَآ أُوتِىَ مُوسَىٰ وَعِيسَىٰ وَٱلنَّبِيُّونَ مِن رَّبِّهِمْ لَا نُفَرِّقُ بَيْنَ أَحَدٍ مِّنْهُمْ وَنَحْنُ لَهُۥ مُسْلِمُونَ
Say, "We have believed in Allah and in what was revealed to us and what was revealed to Abraham, Ishmael, Isaac, Jacob, and the Descendants, and in what was given to Moses and Jesus and to the prophets from their Lord. We make no distinction between any of them, and we are Muslims [submitting] to Him."
كَيْفَ يَهْدِى ٱللَّهُ قَوْمًا كَفَرُوا۟ بَعْدَ إِيمَـٰنِهِمْ وَشَهِدُوٓا۟ أَنَّ ٱلرَّسُولَ حَقٌّ وَجَآءَهُمُ ٱلْبَيِّنَـٰتُ ۚ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّـٰلِمِينَ
How shall Allah guide a people who disbelieved after their belief and had witnessed that the Messenger is true and clear signs had come to them? And Allah does not guide the wrongdoing people.
أُو۟لَـٰٓئِكَ جَزَآؤُهُمْ أَنَّ عَلَيْهِمْ لَعْنَةَ ٱللَّهِ وَٱلْمَلَـٰٓئِكَةِ وَٱلنَّاسِ أَجْمَعِينَ
Those - their recompense will be that upon them is the curse of Allah and the angels and the people, all together,