It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) that a man asked him about seeking permission when entering (the room) of his parents, and he replied: "Yes, you must certainly ask permission. Would you like to see some private state or nakedness of theirs that ought to be covered?"
This athar (report) is sahih, and Imam Ibn Abi Shaybah recorded it in al-Musannaf (hadith: 2645).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الأدب / 2645
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :أثر صحيح. » «انفرد به المصنف من هذا الطريق»