Amatul Rahmân Omer:
Behold! they fold up their bosoms (refusing to accept the truth with open minds and in an effort) that they may hide (their enmity and hatred) from Him. Behold even (as they try to hide their true selves) when they wrap themselves in their garments (so that they might not see Divine signs, nor hear His Messages), He knows what they conceal and what they reveal. He is Well-Aware of what is in the (depths of their) hearts.