The Family of Imran
يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِن تُطِيعُوا۟ فَرِيقًا مِّنَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَـٰبَ يَرُدُّوكُم بَعْدَ إِيمَـٰنِكُمْ كَـٰفِرِينَ
O you who have believed, if you obey a party of those who were given the Scripture, they would turn you back, after your belief, [to being] unbelievers.
Nearby ayahs help place verse 3:100 in sequence and meaning.
قُلْ يَـٰٓأَهْلَ ٱلْكِتَـٰبِ لِمَ تَكْفُرُونَ بِـَٔايَـٰتِ ٱللَّهِ وَٱللَّهُ شَهِيدٌ عَلَىٰ مَا تَعْمَلُونَ
Say, "O People of the Scripture, why do you disbelieve in the verses of Allah while Allah is Witness over what you do?"
قُلْ يَـٰٓأَهْلَ ٱلْكِتَـٰبِ لِمَ تَصُدُّونَ عَن سَبِيلِ ٱللَّهِ مَنْ ءَامَنَ تَبْغُونَهَا عِوَجًا وَأَنتُمْ شُهَدَآءُ ۗ وَمَا ٱللَّهُ بِغَـٰفِلٍ عَمَّا تَعْمَلُونَ
Say, "O People of the Scripture, why do you avert from the way of Allah those who believe, seeking to make it [seem] deviant, while you are witnesses [to the truth]? And Allah is not unaware of what you do."
وَكَيْفَ تَكْفُرُونَ وَأَنتُمْ تُتْلَىٰ عَلَيْكُمْ ءَايَـٰتُ ٱللَّهِ وَفِيكُمْ رَسُولُهُۥ ۗ وَمَن يَعْتَصِم بِٱللَّهِ فَقَدْ هُدِىَ إِلَىٰ صِرَٰطٍ مُّسْتَقِيمٍ
And how could you disbelieve while to you are being recited the verses of Allah and among you is His Messenger? And whoever holds firmly to Allah has [indeed] been guided to a straight path.
يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ ٱتَّقُوا۟ ٱللَّهَ حَقَّ تُقَاتِهِۦ وَلَا تَمُوتُنَّ إِلَّا وَأَنتُم مُّسْلِمُونَ
O you who have believed, fear Allah as He should be feared and do not die except as Muslims [in submission to Him].