It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that Sayyiduna Umar (may Allah be pleased with him) passed by Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) while he was weeping. Sayyiduna Umar (may Allah be pleased with him) asked: "What has made you weep?" He said: "A hadith that I heard from the occupant of this grave, that is, the Prophet (peace and blessings be upon him). I heard the Messenger of Allah (peace and blessings be upon him) say: 'Indeed, even the least degree of showing off (riya') is shirk, and the most beloved of servants to Allah are the pious, unknown ones who, when they are absent, are not looked for, and when they are present, are not recognised; these are the leaders of guidance and the lamps of knowledge.'"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Qilabah (may Allah have mercy on him) except Abu Qahdham, and his name is al-Nadr bin Ma'bad al-Jarmi."
Hadith Referenceالمعجم الأوسط / باب الفاء / 4950
Hadith Gradingمحدثین:غريب، تفرد به أبو قحذم
Hadith Takhrij«قال ابن عدي: لا أعلم يرويه عن أبي قلابة غير أبي قحذم «الكامل في الضعفاء، ج 8، ص 264»» «أخرجه الحاكم فى «المستدرك» برقم: 4، 5218، 8028، وابن ماجه فى «سننه» برقم: 3989، والطحاوي فى «شرح مشكل الآثار» برقم: 1798، 1799، والطبراني فى «الكبير» برقم: 53، 321، 322، والطبراني فى «الصغير» برقم: 892، والطبراني فى «الأوسط» برقم: 7112»