Al-Baqarah 2:11

وَمِنَ النَّاسِ مَن يَقُولُ آمَنَّا بِاللَّهِ وَبِالْيَوْمِ الْآخِرِ وَمَا هُم بِمُؤْمِنِينَ

And of the people are some who say, "We believe in Allah and the Last Day," but they are not believers.

يُخَادِعُونَ اللَّهَ وَالَّذِينَ آمَنُوا وَمَا يَخْدَعُونَ إِلَّا أَنفُسَهُمْ وَمَا يَشْعُرُونَ

They [think to] deceive Allah and those who believe, but they deceive not except themselves and perceive [it] not.

فِي قُلُوبِهِم مَّرَضٌ فَزَادَهُمُ اللَّهُ مَرَضًا ۖ وَلَهُمْ عَذَابٌ أَلِيمٌ بِمَا كَانُوا 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.

أَلَا إِنَّهُمْ هُمُ الْمُفْسِدُونَ وَلَـٰكِن لَّا يَشْعُرُونَ

Unquestionably, it is they who are the corrupters, but they perceive [it] not.

وَإِذَا قِيلَ لَهُمْ آمِنُوا كَمَا آمَنَ النَّاسُ قَالُوا أَنُؤْمِنُ كَمَا آمَنَ السُّفَهَاءُ ۗ أَلَا إِنَّهُمْ هُمُ السُّفَهَاءُ وَلَـٰكِن لَّا يَعْلَمُونَ

And when it is said to them, "Believe as the people have believed," they say, "Should we believe as the foolish have believed?" Unquestionably, it is they who are the foolish, but they know [it] not.

وَإِذَا لَقُوا الَّذِينَ آمَنُوا قَالُوا آمَنَّا وَإِذَا خَلَوْا إِلَىٰ شَيَاطِينِهِمْ قَالُوا إِنَّا مَعَكُمْ إِنَّمَا نَحْنُ مُسْتَهْزِئُونَ

And when they meet those who believe, they say, "We believe"; but when they are alone with their evil ones, they say, "Indeed, we are with you; we were only mockers."