Al-Baqarah (البقرة)
Chapter 2 - The Cow
وَمِنَ ٱلنَّاسِ مَن يَقُولُ ءَامَنَّا بِٱللَّهِ وَبِٱلْيَوْمِ ٱلْءَاخِرِ وَمَا هُم بِمُؤْمِنِينَ
Wa minan naasi mai yaqoolu aamannaa billaahi wa bil yawmil aakhiri wa maa hum bimu'mineen
And of the people are some who say, "We believe in Allah and the Last Day," but they are not believers.
Quran 2:8 - Surah Al-Baqarah
إِنَّ ٱلَّذِينَ كَفَرُوا۟ سَوَآءٌ عَلَيْهِمْ ءَأَنذَرْتَهُمْ أَمْ لَمْ تُنذِرْهُمْ لَا يُؤْمِنُونَ
Indeed, those who disbelieve - it is all the same for them whether you warn them or do not warn them - they will not believe.
خَتَمَ ٱللَّهُ عَلَىٰ قُلُوبِهِمْ وَعَلَىٰ سَمْعِهِمْ ۖ وَعَلَىٰٓ أَبْصَٰرِهِمْ غِشَٰوَةٌۭ ۖ وَلَهُمْ عَذَابٌ عَظِيمٌۭ
Allah has set a seal upon their hearts and upon their hearing, and over their vision is a veil. And for them is a great punishment.
وَمِنَ ٱلنَّاسِ مَن يَقُولُ ءَامَنَّا بِٱللَّهِ وَبِٱلْيَوْمِ ٱلْءَاخِرِ وَمَا هُم بِمُؤْمِنِينَ
And of the people are some who say, "We believe in Allah and the Last Day," but they are not believers.
يُخَٰدِعُونَ ٱللَّهَ وَٱلَّذِينَ ءَامَنُوا۟ وَمَا يَخْدَعُونَ إِلَّآ أَنفُسَهُمْ وَمَا يَشْعُرُونَ
They [think to] deceive Allah and those who believe, but they deceive not except themselves and perceive [it] not.
فِى قُلُوبِهِم مَّرَضٌۭ فَزَادَهُمُ ٱللَّهُ مَرَضًۭا ۖ وَلَهُمْ عَذَابٌ أَلِيمٌۢ بِمَا كَانُوا۟ يَكْذِبُونَ
In their hearts is disease, so Allah has increased their disease; and for them is a painful punishment because they [habitually] used to lie.