 cover their breasts to try to hide their disbelief from god. but he knows very well whatever they conceal or reveal even when they cover themselves with their garments. god certainly knows the innermost of the hearts.
ألا إنهم يثنون صدورهم ليستخفوا منه ألا حين يستغشون ثيابهم يعلم ما يسرون وما يعلنون إنه عليم بذات الصدور