Unquestionably, they the disbelievers turn away their breasts to hide themselves from Him. Unquestionably, [even] when they cover themselves in their clothing, Allah knows what they conceal and what they declare. Indeed, He is Knowing of that within the breasts.
Quran - Verse : 5, Surah : Hud : 11, Chapter : The Prophet Hood | 11:5

أَلَا إِنَّهُمْ يَثْنُونَ صُدُورَهُمْ لِيَسْتَخْفُوا مِنْهُ ۚ أَلَا حِينَ يَسْتَغْشُونَ ثِيَابَهُمْ يَعْلَمُ مَا يُسِرُّونَ وَمَا يُعْلِنُونَ ۚ إِنَّهُ عَلِيمٌ بِذَاتِ الصُّدُورِ
القرآن الكريم - آیة : 5، سورة هُوْد : 11 | 11:5