and when they come to you they say we are muslims whereas they were disbelievers when they came in and disbelievers when they went out and allah knows very well what they hide.
وإذا جاءوكم قالوا آمنا وقد دخلوا بالكفر وهم قد خرجوا به والله أعلم بما كانوا يكتمون