وَإِذَا جَاءُوكُمْ قَالُوا آمَنَّا وَقَد دَّخَلُوا بِالْكُفْرِ وَهُمْ قَدْ خَرَجُوا بِهِ ۚ وَاللَّهُ أَعْلَمُ بِمَا كَانُوا يَكْتُمُونَ (61)
(5:61) Whenever they come to you they say: 'We believe,' whereas, in fact, they come disbelieving, and go away disbelieving, and Allah knows all that they hide.