It is narrated from Sayyiduna Umar bin Khattab (may Allah be pleased with him), he said: Whoever deliberately looked fully into a house before being granted permission has committed a sin.
Hadith Referenceالادب المفرد / كتاب الاستئذان / 1092
Hadith Gradingالألبانی:ضعيف الإسناد موقوفًا
Hadith Takhrij«ضعيف الإسناد موقوفًا : أخرجه البيهقي فى شعب الإيمان : 8828»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: The chain of narration (isnad) of this athar is weak. In it is the narrator Ammar bin Sa’d, whose meeting with Umar radi Allahu anhu is not established.
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 1092