It was narrated from 'Aishah that the brother of Abu Al-Qu'ais asked permission to enter upon 'Aishah after the Verse of Hijab had been revealed, and she refused to let him in. Mention of that was made to the Prophet (ﷺ) and he said:

"Let him in, for he is your paternal uncle." She said: "The woman breast-fed me, not the man." He said: "He is your paternal uncle, so let him visit you."

أَخْبَرَنَا عَبْدُ الْوَارِثِ بْنُ عَبْدِ الصَّمَدِ بْنِ عَبْدِ الْوَارِثِ، قَالَ حَدَّثَنِي أَبِي، ‏{‏ عَنْ أَبِيهِ، ‏}‏ عَنْ أَيُّوبَ، عَنْ وَهْبِ بْنِ كَيْسَانَ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّ أَخَا أَبِي الْقُعَيْسِ، اسْتَأْذَنَ عَلَى عَائِشَةَ بَعْدَ آيَةِ الْحِجَابِ فَأَبَتْ أَنْ تَأْذَنَ لَهُ فَذُكِرَ ذَلِكَ لِلنَّبِيِّ صلى الله عليه وسلم فَقَالَ ‏"‏ ائْذَنِي لَهُ فَإِنَّهُ عَمُّكِ ‏"‏ ‏.‏ فَقُلْتُ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ ‏.‏ فَقَالَ ‏"‏ إِنَّهُ عَمُّكِ فَلْيَلِجْ عَلَيْكِ ‏"‏ ‏.‏