Abd al-Malik bin Umayr reports from Munib, from his paternal uncle, who said: One of the Companions of the Prophet came to know about another Companion that he narrated from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "Whoever conceals (the faults of) his Muslim brother in this world, Allah Almighty will conceal (his faults) on the Day of Resurrection." So that Companion travelled to the other Companion, who was in Egypt, and asked him about the hadith. The other Companion said: "Yes! I heard the Prophet (peace and blessings be upon him) say: 'Whoever conceals (the faults of) his Muslim brother in this world, Allah Almighty will conceal (his faults) on the Day of Resurrection.'" Then that Companion (the one who had travelled from Madinah to Egypt) said: "I too have heard this from the Prophet (peace and blessings be upon him)."
Imam Ahmad recorded it. As for this narrator Munib, if he is Munib bin Abdullah, then Imam Ibn Hibban (may Allah have mercy on him) declared him thiqah (trustworthy); and if someone else is meant, then I have not seen anyone mention him.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 563
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اورده المؤلف فى زوائد المسند 210 ، أخرجه مسند أحمد برقم: 7882»