It is narrated from Hazrat Thawban (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Do not trouble the servants of Allah, do not disgrace them, and do not seek out their faults, for whoever seeks out the faults of his Muslim brother, Allah will seek out his faults, until He disgraces him within his own house.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22402
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد حسن