Muwatta Imam Malik Book of Suckling, Hadith 1

Yahya related to me from Malik from Abdullah ibn Abi Bakr from Amra bint Abd ar-Rahman that A'isha, umm al-muminin informed her that the Messenger of Allah ﷺ was with her and she heard the voice of a man asking permission to enter the room of Hafsa. A'isha said that she had said, "Messenger of Allah! There is a man asking permission to enter your house!" The Messenger of Allah ﷺ said, "I think it is so-and-so" (referring to a paternal uncle of Hafsa by suckling). A'isha said, "Messenger of Allah! If so-and-so were alive (referring to her paternal uncle by suckling) could he enter where I am?" The Messenger of Allah ﷺ said, "Yes. Suckling makes haram as birth makes haram."

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، عَنْ عَمْرَةَ بِنْتِ عَبْدِ الرَّحْمَنِ، أَنَّ عَائِشَةَ أُمَّ الْمُؤْمِنِينَ، أَخْبَرَتْهَا أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ عِنْدَهَا وَأَنَّهَا سَمِعَتْ صَوْتَ رَجُلٍ يَسْتَأْذِنُ فِي بَيْتِ حَفْصَةَ قَالَتْ عَائِشَةُ فَقُلْتُ يَا رَسُولَ اللَّهِ هَذَا رَجُلٌ يَسْتَأْذِنُ فِي بَيْتِكَ . فَقَالَ رَسُولُ اللَّهِ ﷺ " أُرَاهُ فُلاَنًا " . لِعَمٍّ لِحَفْصَةَ مِنَ الرَّضَاعَةِ . فَقَالَتْ عَائِشَةُ يَا رَسُولَ اللَّهِ لَوْ كَانَ فُلاَنٌ حَيًّا - لِعَمِّهَا مِنَ الرَّضَاعَةِ - دَخَلَ عَلَىَّ فَقَالَ رَسُولُ اللَّهِ ﷺ " نَعَمْ إِنَّ الرَّضَاعَةَ تُحَرِّمُ مَا تُحَرِّمُ الْوِلاَدَةُ " .