Hadithcore
Al-Adab Al-Mufrad, 1060
hasan· Al-Albani

Muslim ibn Nadhir said, "A man asked Hudhayfa, 'Should I ask permission to enter where my mother is?' He replied, 'If you were not to ask her permission, you would see what you dislike.'"

حَدَّثَنَا آدَمُ، قَالَ‏:‏ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ قَالَ‏:‏ سَمِعْتُ مُسْلِمَ بْنَ نَذِيرٍ يَقُولُ‏:‏ سَأَلَ رَجُلٌ حُذَيْفَةَ فَقَالَ‏:‏ أَسْتَأْذِنُ عَلَى أُمِّي‏؟‏ فَقَالَ‏:‏ إِنْ لَمْ تَسْتَأْذِنْ عَلَيْهَا رَأَيْتَ مَا تَكْرَهُ‏.‏

References2 variants
In-Book Reference
Book 43, Hadith 10
English Reference
Book 43, Hadith 1060