وَإِذا جاءوكُم قالوا آمَنّا وَقَد دَخَلوا بِالكُفرِ وَهُم قَد خَرَجوا بِهِ ۚ وَاللَّهُ أَعلَمُ بِما كانوا يَكتُمونَ

When they come to you, they say, “We believe,” yet they enter with disbelief and exit the same way. But God is Best Aware of what they hide.