Sura Āl-ʿImrān 3:118

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَتَّخِذُوا۟ بِطَانَةً مِّن دُونِكُمْ لَا يَأْلُونَكُمْ خَبَالًا وَدُّوا۟ مَا عَنِتُّمْ قَدْ بَدَتِ ٱلْبَغْضَآءُ مِنْ أَفْوَٰهِهِمْ وَمَا تُخْفِى صُدُورُهُمْ أَكْبَرُ قَدْ بَيَّنَّا لَكُمُ ٱلْأَيَٰتِ إِن كُنتُمْ تَعْقِلُونَ

yā-ayyuhā lladhīna āmanū lā tattakhidhū biṭānatan min dūnikum lā yalūnakum khabālan waddū mā ʿanittum qad badati l-baghḍāʾu min afwāhihim wa-mā tukhfī ṣudūruhum akbaru qad bayyannā lakumu l-ayāti in kuntum taʿqilūna

O ye who believe! Take not into your intimacy those outside your ranks: They will not fail to corrupt you. They only desire your ruin: Rank hatred has already appeared from their mouths: What their hearts conceal is far worse. We have made plain to you the Signs, if ye have wisdom.

Sura al-Nūr 24:31

وَقُل لِّلْمُؤْمِنَٰتِ يَغْضُضْنَ مِنْ أَبْصَٰرِهِنَّ وَيَحْفَظْنَ فُرُوجَهُنَّ وَلَا يُبْدِينَ زِينَتَهُنَّ إِلَّا مَا ظَهَرَ مِنْهَا وَلْيَضْرِبْنَ بِخُمُرِهِنَّ عَلَىٰ جُيُوبِهِنَّ وَلَا يُبْدِينَ زِينَتَهُنَّ إِلَّا لِبُعُولَتِهِنَّ أَوْ ءَابَآئِهِنَّ أَوْ ءَابَآءِ بُعُولَتِهِنَّ أَوْ أَبْنَآئِهِنَّ أَوْ أَبْنَآءِ بُعُولَتِهِنَّ أَوْ إِخْوَٰنِهِنَّ أَوْ بَنِىٓ إِخْوَٰنِهِنَّ أَوْ بَنِىٓ أَخَوَٰتِهِنَّ أَوْ نِسَآئِهِنَّ أَوْ مَا مَلَكَتْ أَيْمَٰنُهُنَّ أَوِ ٱلتَّٰبِعِينَ غَيْرِ أُو۟لِى ٱلْإِرْبَةِ مِنَ ٱلرِّجَالِ أَوِ ٱلطِّفْلِ ٱلَّذِينَ لَمْ يَظْهَرُوا۟ عَلَىٰ عَوْرَٰتِ ٱلنِّسَآءِ وَلَا يَضْرِبْنَ بِأَرْجُلِهِنَّ لِيُعْلَمَ مَا يُخْفِينَ مِن زِينَتِهِنَّ وَتُوبُوٓا۟ إِلَى ٱللَّـهِ جَمِيعًا أَيُّهَ ٱلْمُؤْمِنُونَ لَعَلَّكُمْ تُفْلِحُونَ

wa-qul lil-mumināti yaghḍuḍna min abṣārihinna wa-yaḥfaẓna furūjahunna wa-lā yubdīna zīnatahunna illā mā ẓahara minhā wa-l-yaḍribna bikhumurihinna ʿalā juyūbihinna wa-lā yubdīna zīnatahunna illā li-buʿūlatihinna aw ābāʾihinna aw ābāʾi buʿūlatihinna aw abnāʾihinna aw abnāʾi buʿūlatihinna aw ikhwānihinna aw banī ikhwānihinna aw banī akhawātihinna aw nisāʾihinna aw mā malakat aymānuhunna awi l-tābiʿīna ghayri ūlī l-irbati mina l-rijāli awi l-ṭifli lladhīna lam yaẓharū ʿalā ʿawrāti l-nisāʾi wa-lā yaḍribna biarjulihinna līuʿlama mā yukhfīna min zīnatihinna wa-tūbū ilā allāhi jamīʿan ayyuha l-muʾminūna la-ʿallakum tufliḥūna

And say to the believing women that they should lower their gaze and guard their modesty; that they should not display their beauty and ornaments except what (must ordinarily) appear thereof; that they should draw their veils over their bosoms and not display their beauty except to their husbands, their fathers, their husband's fathers, their sons, their husbands' sons, their brothers or their brothers' sons, or their sisters' sons, or their women, or the slaves whom their right hands possess, or male servants free of physical needs, or small children who have no sense of the shame of sex; and that they should not strike their feet in order to draw attention to their hidden ornaments. And O ye Believers! turn ye all together towards Allah, that ye may attain Bliss.

Sura al-Ghāfir 40:19

يَعْلَمُ خَآئِنَةَ ٱلْأَعْيُنِ وَمَا تُخْفِى ٱلصُّدُورُ

yaʿlamu khāʾinata l-aʿyuni wa-mā tukhfī l-ṣudūru

(Allah) knows of (the tricks) that deceive with the eyes, and all that the hearts (of men) conceal.