Al-Adab Al-Mufrad, Book 42, Hadith 79 (In-Book) ⓘ
Abu Hurayra said, "The most miserly of people is the one who is miserly with the greeting. The most incapable of people of people is the one who is the most incapable of supplication."
حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَبَانَ، قَالَ: حَدَّثَنَا عَلِيُّ بْنُ مُسْهِرٍ، عَنْ عَاصِمٍ، عَنْ أَبِي عُثْمَانَ، عَنْ أَبِي هُرَيْرَةَ قَالَ: أَبْخَلُ النَّاسِ الَّذِي يَبْخَلُ بِالسَّلاَمِ، وَإِنَّ أَعْجَزَ النَّاسِ مَنْ عَجَزَ بِالدُّعَاءِ.
also referenced under: Hadith 1042 (Reference) & Book 42, Hadith 1042 (English)