05The tongue
Whoever believes in Allah and the Last Day, let him speak good or keep silent.
Bukhārī, Muslim · ṣaḥīḥ
Ghībah — backbiting
To mention your brother with what he would dislike. Asked “and if it is true of him?” — he ﷺ said: if it is true, you have backbitten him; if false, you have slandered him.
Muslim · ṣaḥīḥ; Q 49:12
Permitted only in: seeking redress before one able to give it, seeking a ruling, warning a Muslim of real harm, naming one who sins openly, and identification where no other means exists.
Namīmah — talebearing
Carrying words between people to spoil what is between them. “The talebearer will not enter Paradise.” If it reaches you, do not believe it, do not pass it on, and do not think ill of the one reported against.
Bukhārī, Muslim · ṣaḥīḥ
Also of the tongue: lying, false oaths, mockery, insulting names, arguing for its own sake, and boasting. Jesting is permitted — he ﷺ jested, and said only what was true.
Q 49:11; Tirmidhī · ṣaḥīḥ