Defamation (Lumaz) in the Holy Quran

﴿ٱلَّذِينَ يَلۡمِزُونَ ٱلۡمُطَّوِّعِينَ مِنَ ٱلۡمُؤۡمِنِينَ فِي ٱلصَّدَقَٰتِ وَٱلَّذِينَ لَا يَجِدُونَ إِلَّا جُهۡدَهُمۡ فَيَسۡخَرُونَ مِنۡهُمۡ سَخِرَ ٱللَّهُ مِنۡهُمۡ وَلَهُمۡ عَذَابٌ أَلِيمٌ ﴾ [At-Taubah: 79]

(79) Those who criticize the contributors among the believers concerning [their] charities and [criticize] the ones who find nothing [to spend] except their effort, so they ridicule them - Allah will ridicule them, and they will have a painful punishment.

Surah: At-Taubah - Verse: 79 - Juz: 10 - Page: 199

﴿يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا يَسۡخَرۡ قَوۡمٞ مِّن قَوۡمٍ عَسَىٰٓ أَن يَكُونُواْ خَيۡرٗا مِّنۡهُمۡ وَلَا نِسَآءٞ مِّن نِّسَآءٍ عَسَىٰٓ أَن يَكُنَّ خَيۡرٗا مِّنۡهُنَّۖ وَلَا تَلۡمِزُوٓاْ أَنفُسَكُمۡ وَلَا تَنَابَزُواْ بِٱلۡأَلۡقَٰبِۖ بِئۡسَ ٱلِٱسۡمُ ٱلۡفُسُوقُ بَعۡدَ ٱلۡإِيمَٰنِۚ وَمَن لَّمۡ يَتُبۡ فَأُوْلَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ ﴾ [Al-Ḥujurāt: 11]

(11) O you who have believed, let not a people ridicule [another] people; perhaps they may be better than them; nor let women ridicule [other] women; perhaps they may be better than them. And do not insult one another and do not call each other by [offensive] nicknames. Wretched is the name of disobedience after [one's] faith. And whoever does not repent - then it is those who are the wrongdoers.

Surah: Al-Ḥujurāt - Verse: 11 - Juz: 26 - Page: 516

﴿ وَيۡلٞ لِّكُلِّ هُمَزَةٖ لُّمَزَةٍ * ٱلَّذِي جَمَعَ مَالٗا وَعَدَّدَهُۥ ﴾ [Al-Humazah: 1-2]

(1) Woe to every scorner and mocker

(2) Who collects wealth and [continuously] counts it.

Surah: Al-Humazah - Verse: 1-2 - Juz: 30 - Page: 601