(Al-Baqara) 2 : 204
وَمِنَ النَّاسِ مَنْ يُعْجِبُكَ قَوْلُهُ فِي الْحَيَاةِ الدُّنْيَا وَيُشْهِدُ اللَّهَ عَلَىٰ مَا فِي قَلْبِهِ وَهُوَ أَلَدُّ الْخِصَامِ
And there is among mankind the one whose speech in the worldly life dazzles you, and he is witnessing Lord Allah upon what is in his heart, and he is the most quarrelsome of enemies.