Authentic hadithNarrated by At-Termedhy
A believer is not a slanderer, nor a curser, nor a person who speaks obscenely, nor a person who uses foul language
عَنْ عَبْدِ اللهِ بْنِ مَسْعُودٍ رضي الله عنه قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَيْسَ الْمُؤْمِنُ بِالطَّعَّانِ وَلاَ اللَّعَّانِ وَلاَ الفَاحِشِ وَلاَ البَذِيءِ».
Explanation
The Prophet (may Allah's peace and blessings be upon him) informed us that it is not the nature of a believer who has complete Imān to criticize people’s lineage, or to revile and curse others, or to be obscene in action or speech without shame.
Source
سنن الترمذي (3/ 520) (1977)، تحفة الأحوذي (6/ 95)، مجموع الفتاوى (12/ 478).
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