"No doubt! They did fold up their breasts, that they may hide from Him. Surely, even when they cover themselves with their garments, He knows what they conceal and what they reveal. Verily, He is the All-Knower of the (innermost secrets) of the breasts." (V.11:5)
Authentic
hadith of Sahih al-Bukhari
Companion’s words (mawquf)Sahih al-Bukhari 4683
Ibn `Abbas recited:-- "No doubt! They fold up their breasts in order to hide from Him. Surely! Even when they cover themselves with their garments.." (11.5)