Surah Al-Maaida Verse 61

وَإِذَا جَاءُوكُمْ قَالُوا آمَنَّا وَقَد دَّخَلُوا بِالْكُفْرِ وَهُمْ قَدْ خَرَجُوا بِهِ ۚ وَاللَّهُ أَعْلَمُ بِمَا كَانُوا يَكْتُمُونَ

Wa izaa jaaa'ookum qaalooo aamannaa wa qad dakhaloo bilkufri wa hum qad kharajoo bih; wallaahu a'lamu bimaa kaanoo yaktumoon

Translation / The Meaning

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 Allah is most knowing of what they were concealing.