Surah Al-Baqara Verse 204

وَمِنَ النَّاسِ مَن يُعْجِبُكَ قَوْلُهُ فِي الْحَيَاةِ الدُّنْيَا وَيُشْهِدُ اللَّهَ عَلَىٰ مَا فِي قَلْبِهِ وَهُوَ أَلَدُّ الْخِصَامِ

Wa minan naasi mai yu'jibuka qawluhoo fil hayaatid dunyaa wa yushhidul laaha 'alaa maa fee qalbihee wa huwa aladdulkhisaam

Translation / The Meaning

And of the people is he whose speech pleases you in worldly life, and he calls Allah to witness as to what is in his heart, yet he is the fiercest of opponents.