Surah Hud, Verse 5

أَلَآ إِنَّهُمۡ يَثۡنُونَ صُدُورَهُمۡ لِيَسۡتَخۡفُواْ مِنۡهُۚ أَلَا حِينَ يَسۡتَغۡشُونَ ثِيَابَهُمۡ يَعۡلَمُ مَا يُسِرُّونَ وَمَا يُعۡلِنُونَۚ إِنَّهُۥ عَلِيمُۢ بِذَاتِ ٱلصُّدُورِ٥

alā innahum yathnūna ṣudūrahum liyastakhfū min'hu alā ḥīna yastaghshūna thiyābahum yaʿlamu mā yusirrūna wamā yuʿ'linūna innahu ʿalīmun bidhāti l-ṣudūri

Unquestionably, they [i.e., the disbelievers] turn away their breasts to hide themselves from him. Unquestionably, [even] when they cover themselves in their clothing, He [i.e., Allāh] knows what they conceal and what they declare. Indeed, He is Knowing of that within the breasts.