My foster uncle came and asked permission (to enter) but I refused to admit him till I asked Allah's Apostle about that. He said, "He is your uncle, so allow him to come in." I said, "O Messenger of Allah ﷺ! I have been suckled by a woman and not by a man." Messenger of Allah ﷺ said, "He is your uncle, so let him enter upon you." And that happened after the order of Al-Hijab (compulsory veiling) was revealed. All things which become unlawful because of blood relations are unlawful because of the corresponding foster suckling relations.

أَنَّهَا قَالَتْ جَاءَ عَمِّي مِنَ الرَّضَاعَةِ فَاسْتَأْذَنَ عَلَىَّ فَأَبَيْتُ أَنْ آذَنَ لَهُ حَتَّى أَسْأَلَ رَسُولَ اللَّهِ ﷺ فَجَاءَ رَسُولُ اللَّهِ ﷺ فَسَأَلْتُهُ عَنْ ذَلِكَ فَقَالَ إِنَّهُ عَمُّكِ فَأْذَنِي لَهُ قَالَتْ فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ قَالَتْ فَقَالَ رَسُولُ اللَّهِ ﷺ إِنَّهُ عَمُّكِ فَلْيَلِجْ عَلَيْكِ قَالَتْ عَائِشَةُ وَذَلِكَ بَعْدَ أَنْ ضُرِبَ عَلَيْنَا الْحِجَابُ قَالَتْ عَائِشَةُ يَحْرُمُ مِنَ الرَّضَاعَةِ مَا يَحْرُمُ مِنَ الْوِلاَدَةِ

“My uncle through suckling came and asked permission (to enter) but I refused to admit him until I asked the Messenger of Allah. So the Messenger of Allah said: “Let him in since he is your uncle.’” She said: “It is only the woman who suckled me; I was not suckled by the man.’ So he said: ‘Indeed he is your uncle, so let him in.’”

جَاءَ عَمِّي مِنَ الرَّضَاعَةِ يَسْتَأْذِنُ عَلَىَّ فَأَبَيْتُ أَنْ آذَنَ لَهُ حَتَّى أَسْتَأْمِرَ رَسُولَ اللَّهِ ﷺ فَقَالَ رَسُولُ اللَّهِ ﷺ فَلْيَلِجْ عَلَيْكِ فَإِنَّهُ عَمُّكِ قَالَتْ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ قَالَ فَإِنَّهُ عَمُّكِ فَلْيَلِجْ عَلَيْكِ

Yahya related to me from Malik from Hisham ibn Urwa from his father that A'isha, umm al-muminin said, "My paternal uncle by suckling came to me and I refused to give him permission to enter until I had asked the Messenger of Allah ﷺ about it. The Messenger of Allah ﷺ came and I asked him about it. He said, 'He is your paternal uncle, so give him permission.' So I said, 'Messenger of Allah! The woman nursed me not the man.' He said, 'He is your paternal uncle, so let him enter.' " A'isha said, "That was after the veil had been imposed on us." A'isha added, "What is haram by birth is made haram by suckling."

أَنْ آذَنَ لَهُ عَلَىَّ حَتَّى أَسْأَلَ رَسُولَ اللَّهِ ﷺ عَنْ ذَلِكَ فَجَاءَ رَسُولُ اللَّهِ ﷺ فَسَأَلْتُهُ عَنْ ذَلِكَ فَقَالَ إِنَّهُ عَمُّكِ فَأْذَنِي لَهُ قَالَتْ فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ فَقَالَ إِنَّهُ عَمُّكِ فَلْيَلِجْ عَلَيْكِ قَالَتْ عَائِشَةُ وَذَلِكَ بَعْدَ مَا ضُرِبَ عَلَيْنَا الْحِجَابُ وَقَالَتْ عَائِشَةُ يَحْرُمُ مِنَ الرَّضَاعَةِ مَا يَحْرُمُ مِنَ الْوِلاَدَةِ

[Machine] "My uncle came to me from the breast-feeding and asked for permission from me after the curtain was struck. I said, 'I will not grant you permission until I seek permission from the Messenger of Allah ﷺ.' So, I mentioned that to the Messenger of Allah ﷺ, and he said, 'Let your uncle come in to you.' I said, 'Indeed, the woman breastfed me and the man did not breastfeed me.' So, the Messenger of Allah ﷺ said, 'He is your uncle, so let him come in to you.'"

جَاءَنِي عَمِّي مِنَ الرَّضَاعَةِ يَسْتَأْذِنُ عَلَيَّبَعْدَمَا ضُرِبَ الْحِجَابُ قُلْتُ لَا آذَنُ لَكَ حَتَّى أَسْتَأْذِنَ رَسُولَ اللهِ ﷺ فَذَكَرْتُ ذَلِكَ لِرَسُولِ اللهِ ﷺ فَقَالَ لِيَلِجْ عَلَيْكِ عَمُّكِ قُلْتُ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ فَقَالَ رَسُولُ اللهِ ﷺ هُوَ عَمُّكِ فَلْيَلِجْ عَلَيْكِ

[Machine] Her uncle, the brother of her father Al-Quais, came to seek permission from her after the veiling of women had been commanded. She refused to give him permission until the Messenger of Allah ﷺ came and sought permission for him. When the Prophet ﷺ came, she mentioned this to him, and she said, "My uncle, the brother of my father, came, and I kept repeating it until I sought your permission." He said, "Isn't he your uncle?" She said, "He breastfed me, but I was not breastfed by a man." He said, "He is your uncle, so let him enter upon you." Aisha used to say that what is forbidden by birth is also forbidden by breastfeeding.

أَنَّ عَمَّهَا أَخَا أَبِي الْقُعَيْسِ جَاءَ يَسْتَأْذِنُ عَلَيْهَا بَعْدَمَا ضُرِبَ الْحِجَابُ فَأَبَتْ أَنْ تَأْذَنَ لَهُ حَتَّى يَأْتِيَ رَسُولُ اللَّهِ ﷺ فَأَسْتَأْذِنَهُ فَلَمَّا جَاءَ النَّبِيُّ ﷺ ذَكَرَتْ ذَلِكَ لَهُ فَقَالَتْ جَاءَ عَمِّي أَخُو أَبِي الْقُعَيْسِ فَرَدَدْتُهُ حَتَّى أَسْتَأْذِنَكَ قَالَ «أَوَ لَيْسَ بِعَمِّكِ؟» قَالَتْ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ فَقَالَ «إِنَّهُ عَمُّكِ فَلْيَلِجْ عَلَيْكِ» فَقََالَتْ وَكَانَتْ عَائِشَةُ تَقُولُ يَحْرُمُ مِنَ الرَّضَاعَةِ مَا يَحْرُمُ مِنَ الْوِلَادَةِ

[Machine] She said, "My uncle came from the fosterage and he sought permission from me, but I refused to grant him permission until I asked the Prophet ﷺ." She said, "So the Messenger of Allah ﷺ came, and I asked him, and he said, 'He is your uncle, so grant him permission.'" She said, "O Messenger of Allah, I was only breastfed by a woman and not by a man." So the Messenger of Allah ﷺ said, "The prohibitions of lineage are based on what is prohibited by birth."

أَنَّهَا قَالَتْ جَاءَ عَمِّي مِنَ الرَّضَاعَةَ فَاسْتَأْذَنَ عَلَيَّ فَأَبَيْتُ أَنْ آذَنَ لَهُ حَتَّى أَسْأَلَ النَّبِيَّ ﷺ قَالَتْ فَجَاءَ رَسُولُ اللَّهِ ﷺ فَسَأَلْتُهُ فَقَالَ «إِنَّهُ عَمُّكِ فَأَذَنِي لَهُ» فَقَالَتْ يَا رَسُولَ اللَّهِ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةٌ وَلَمْ يُرْضِعْنِي الرَّجُلُ فَقَالَ رَسُولُ اللَّهِ ﷺ «يَحْرُمُ مِنَ الرَّضَاعَةِ مَنْ يَحْرُمُ مِنَ الْوِلَادَةِ»

[Machine] The brother of my father's uncle came to seek permission from her after the veil was struck, but she refused to give him permission until the Messenger of Allah ﷺ came and she sought his permission. When the Messenger of Allah ﷺ came, she mentioned that to him. He said, "Did your uncle not come?" She said, "The woman breastfed me and the man did not breastfeed me." He said, "He is your uncle, so let him enter upon you." Aisha considered breastfeeding to establish the relationship similar to that established by birth. They both reported it in Sahih from the Hadith of Hisham bin 'Urwah.

أَخَا أَبِي الْقُعَيْسِ جَاءَ يَسْتَأْذِنُ عَلَيْهَا بَعْدَمَا ضُرِبَ الْحِجَابُ فَأَبَتْ أَنْ تَأْذَنَ لَهُ حَتَّى يَأْتِيَ رَسُولُ اللهِ ﷺ فَتَسْتَأْذِنَهُ فَلَمَّا جَاءَ رَسُولُ اللهِ ﷺ ذَكَرَتْ ذَلِكَ لَهُ فَقَالَتْ جَاءَ عَمِّي أَخُو أَبِي الْقُعَيْسِ فَرَدَدْتُهُ حَتَّى أَسْتَأْذِنَكَ فَقَالَ أَوَلَيْسَ بِعَمِّكِ؟ قَالَتْ إِنَّمَا أَرْضَعَتْنِي الْمَرْأَةُ وَلَمْ يُرْضِعْنِي الرَّجُلُ قَالَ إِنَّهُ عَمُّكِ فَيَلِجُ عَلَيْكِ وَكَانَتْ عَائِشَةُ ؓ تُحَرِّمُ مِنَ الرَّضَاعِ مَا تُحَرِّمُ مِنَ الْوِلَادَةِ أَخْرَجَاهُ فِي الصَّحِيحِ مِنْ حَدِيثِ هِشَامِ بْنِ عُرْوَةَ