The root ف ر ج (f-r-j) in the Quran

وَٱلَّتِىٓ أَحْصَنَتْ فَرْجَهَا فَنَفَخْنَا فِيهَا مِن رُّوحِنَا وَجَعَلْنَٰهَا وَٱبْنَهَآ ءَايَةً لِّلْعَٰلَمِينَ ۝٩١

And [mention] the one who guarded her chastity [i.e., Mary], so We blew into her [garment] through Our angel [i.e., Gabriel], and We made her and her son a sign for the worlds.

وَٱلَّذِينَ هُمْ لِفُرُوجِهِمْ حَٰفِظُونَ ۝٥

And they who guard their private parts

قُل لِّلْمُؤْمِنِينَ يَغُضُّوا۟ مِنْ أَبْصَٰرِهِمْ وَيَحْفَظُوا۟ فُرُوجَهُمْ ذَٰلِكَ أَزْكَىٰ لَهُمْ إِنَّ ٱللَّهَ خَبِيرٌۢ بِمَا يَصْنَعُونَ ۝٣٠

Tell the believing men to reduce [some] of their vision and guard their private parts. That is purer for them. Indeed, Allāh is [fully] Aware of what they do.

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 ٱللَّهِ جَمِيعًا أَيُّهَ ٱلْمُؤْمِنُونَ لَعَلَّكُمْ تُفْلِحُونَ ۝٣١

And tell the believing women to reduce [some] of their vision and guard their private parts and not expose their adornment except that which [necessarily] appears thereof and to wrap [a portion of] their headcovers over their chests and not expose their adornment [i.e., beauty] except to their husbands, their fathers, their husbands' fathers, their sons, their husbands' sons, their brothers, their brothers' sons, their sisters' sons, their women, that which their right hands possess [i.e., slaves], or those male attendants having no physical desire, or children who are not yet aware of the private aspects of women. And let them not stamp their feet to make known what they conceal of their adornment. And turn to Allāh in repentance, all of you, O believers, that you might succeed.

إِنَّ ٱلْمُسْلِمِينَ وَٱلْمُسْلِمَٰتِ وَٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَٰتِ وَٱلْقَٰنِتِينَ وَٱلْقَٰنِتَٰتِ وَٱلصَّٰدِقِينَ وَٱلصَّٰدِقَٰتِ وَٱلصَّٰبِرِينَ وَٱلصَّٰبِرَٰتِ وَٱلْخَٰشِعِينَ وَٱلْخَٰشِعَٰتِ وَٱلْمُتَصَدِّقِينَ وَٱلْمُتَصَدِّقَٰتِ وَٱلصَّٰٓئِمِينَ وَٱلصَّٰٓئِمَٰتِ وَٱلْحَٰفِظِينَ فُرُوجَهُمْ وَٱلْحَٰفِظَٰتِ وَٱلذَّٰكِرِينَ ٱللَّهَ كَثِيرًا وَٱلذَّٰكِرَٰتِ أَعَدَّ ٱللَّهُ لَهُم مَّغْفِرَةً وَأَجْرًا عَظِيمًا ۝٣٥

Indeed, the Muslim men and Muslim women, the believing men and believing women, the obedient men and obedient women, the truthful men and truthful women, the patient men and patient women, the humble men and humble women, the charitable men and charitable women, the fasting men and fasting women, the men who guard their private parts and the women who do so, and the men who remember Allāh often and the women who do so - for them Allāh has prepared forgiveness and a great reward.

أَفَلَمْ يَنظُرُوٓا۟ إِلَى ٱلسَّمَآءِ فَوْقَهُمْ كَيْفَ بَنَيْنَٰهَا وَزَيَّنَّٰهَا وَمَا لَهَا مِن فُرُوجٍ ۝٦

Have they not looked at the heaven above them - how We structured it and adorned it and [how] it has no rifts?

وَمَرْيَمَ ٱبْنَتَ عِمْرَٰنَ ٱلَّتِىٓ أَحْصَنَتْ فَرْجَهَا فَنَفَخْنَا فِيهِ مِن رُّوحِنَا وَصَدَّقَتْ بِكَلِمَٰتِ رَبِّهَا وَكُتُبِهِۦ وَكَانَتْ مِنَ ٱلْقَٰنِتِينَ ۝١٢

And [the example of] Mary, the daughter of ʿImrān, who guarded her chastity, so We blew into [her garment] through Our angel [i.e., Gabriel], and she believed in the words of her Lord and His scriptures and was of the devoutly obedient.

وَٱلَّذِينَ هُمْ لِفُرُوجِهِمْ حَٰفِظُونَ ۝٢٩

And those who guard their private parts

وَإِذَا ٱلسَّمَآءُ فُرِجَتْ ۝٩

And when the heaven is opened