رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 692
The Book of Good Manners
Excellence of Meeting with a Smiling Countenance and Politeness in Speech
عَنْ عَدِيِّ بْنِ حَاتِمٍ رَضِيَ اللَّه عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ اتَّقُوا النَّارَ وَلَوْ بِشِقِّ تَمْرَةٍ فَمَنْ لَمْ يَجِدْ فَبِكَلِمَةٍ طَيِّبَةٍ ((مُتَّفَقٌ عَلَيْهِ)) .
'Adi bin Hatim (May Allah be pleased with him) reported: Messenger of Allah (ﷺ) said, "Guard yourselves against the Fire (of Hell) even if it be only with half a date-fruit (given in charity); and if you cannot afford even that, you should at least say a good word." [Al-Bukhari and Muslim].
Riyad as-Salihin, 692