hadith
3600
۞
The Prophet (SAWA) said, 'The most miserly of all people is he who withholds his greeting.
رسولُ اللهِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ): إنَّ أبخَلَ الناسِ مَن بَخِلَ بِالسلامِ.