Indeed, your Rabb knows what they conceal within and what they reveal.
Sayyed Abbas Sadr-Ameli
And verily your Lord well-knows what their breasts conceal and what they manifest
Al-muntakhab fi tafsir al-Qur'an al-Karim
Allah, your Creator is Omniscient indeed of all that is reposited in their breasts of private thoughts and feelings and of all that they conceal and He is Alimun of all that they reveal