The Quran root ل غ و l-gh-w

لَّا يُؤَاخِذُكُمُ اللَّهُ بِاللَّغْوِ فِي أَيْمَانِكُمْ وَلَٰكِن يُؤَاخِذُكُم بِمَا كَسَبَتْ قُلُوبُكُمْ وَاللَّهُ غَفُورٌ حَلِيمٌ ٢٢٥

بِاللَّغْوِ bil-laghwi · for (what is) unintentional

Allāh does not impose blame upon you for what is unintentional in your oaths, but He imposes blame upon you for what your hearts have earned. And Allāh is Forgiving and Forbearing. (Surah Al-Baqarah, 2:225)

لَا يُؤَاخِذُكُمُ اللَّهُ بِاللَّغْوِ فِي أَيْمَانِكُمْ وَلَٰكِن يُؤَاخِذُكُم بِمَا عَقَّدتُّمُ الْأَيْمَانَ فَكَفَّارَتُهُ إِطْعَامُ عَشَرَةِ مَسَاكِينَ مِنْ أَوْسَطِ مَا تُطْعِمُونَ أَهْلِيكُمْ أَوْ كِسْوَتُهُمْ أَوْ تَحْرِيرُ رَقَبَةٍ فَمَن لَّمْ يَجِدْ فَصِيَامُ ثَلَاثَةِ أَيَّامٍ ذَٰلِكَ كَفَّارَةُ أَيْمَانِكُمْ إِذَا حَلَفْتُمْ وَاحْفَظُوا أَيْمَانَكُمْ كَذَٰلِكَ يُبَيِّنُ اللَّهُ لَكُمْ آيَاتِهِ لَعَلَّكُمْ تَشْكُرُونَ ٨٩

بِاللَّغْوِ bil-laghwi · for the thoughtless utterances

Allāh will not impose blame upon you for what is meaningless in your oaths, but He will impose blame upon you for [breaking] what you intended of oaths. So its expiation is the feeding of ten needy people from the average of that which you feed your [own] families or clothing them or the freeing of a slave. But whoever cannot find [or afford it] - then a fast of three days [is required]. That is the expiation for oaths when you have sworn. But guard your oaths. Thus does Allāh make clear to you His verses [i.e., revealed law] that you may be grateful. (Surah Al-Ma'idah, 5:89)

وَقَالَ الَّذِينَ كَفَرُوا لَا تَسْمَعُوا لِهَٰذَا الْقُرْآنِ وَالْغَوْا فِيهِ لَعَلَّكُمْ تَغْلِبُونَ ٢٦

وَالْغَوْا wal-ghaw · and make noise

And those who disbelieve say, "Do not listen to this Qur’ān and speak noisily during [the recitation of] it that perhaps you will overcome." (Surah Fussilat, 41:26)

لَّا تَسْمَعُ فِيهَا لَاغِيَةً ١١

لَاغِيَةً lāghiyatan · vain talk

Wherein they will hear no unsuitable speech. (Surah Al-Ghashiyah, 88:11)