Al Ma’idah Ayah 61
وَإِذَا جَآءُوكُمْ قَالُوٓاْ ءَامَنَّا وَقَد دَّخَلُواْ بِٱلْكُفْرِ وَهُمْ قَدْ خَرَجُواْ بِهِۦۚ وَٱللَّهُ أَعْلَمُ بِمَا كَانُواْ يَكْتُمُونَ ٦١
When they come to you ?believers? they say, “We believe.” But they are committed to disbelief when they enter and when they leave. And Allah knows what they hide.