5:61
وَإِذَاجَآءُوكُمْقَالُوٓا۟ءَامَنَّاوَقَددَّخَلُوا۟بِٱلْكُفْرِوَهُمْقَدْخَرَجُوا۟بِهِۦ ۚوَٱللَّهُأَعْلَمُبِمَاكَانُوا۟يَكْتُمُونَ٦١
wa-idhā jāūkum qālū āmannā waqad dakhalū bil-kuf'ri wahum qad kharajū bihi wal-lahu aʿlamu bimā kānū yaktumūna
And when they come to you, they say, "We believe." But they have entered with disbelief [in their hearts], and they have certainly left with it. And Allāh is most knowing of what they were concealing.(61)