It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them) that he said: When you begin to mention the faults of your companion, first take a look at your own faults.
Hadith Referenceالادب المفرد / كتاب / 328
Hadith Gradingالألبانی:ضعيف
Hadith Takhrij«ضعيف : أخرجه أحمد فى الزهد : 1046 و ابن أبى الدنيا فى الصمت : 193 و البيهقي فى شعب الإيمان : 6758»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: The chain of narration of this athar is weak; however, as a matter of fact, it is true that when a person searches for the faults of others, he overlooks his own faults and forgets them. The Messenger of Allah (sallallahu alayhi wa sallam) said: ((One of you sees the speck in his brother’s eye but forgets the log or the large piece of wood in his own eye.)) (Ibn Hibban, Hadith: 1848; al-Silsilah al-Sahihah by al-Albani, Hadith: 33) “You notice even the splinter in another’s eye, but do not see the beam in your own eye.”
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 328