Suckling prohibits what giving birth prohibits

Aishah, the Prophet’s ﷺ wife, reported that the Messenger of Allah ﷺ was with her, and that she heard the voice of a man asking permission to enter at Hafsah’s house. Aishah said: “So I said, O Messenger of Allah, I think it is so-and-so, the foster-uncle of Hafsah.” Aishah said: “O Messenger of Allah, this is a man asking permission to enter your house.” She said: The Messenger of Allah ﷺ said: “I think it is so-and-so, the foster-uncle of Hafsah.”

Aishah said: “If so-and-so were alive, her foster-uncle, he would have been allowed to enter upon me?” The Messenger of Allah ﷺ said: “Yes. Indeed, breastfeeding makes unlawful what birth makes unlawful.”

أَنَّ عَائِشَةَ ؓ، زَوْجَ النَّبِيِّ ﷺ، أَخْبَرَتْهَا أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ عِنْدَهَا، وَأَنَّهَا سَمِعَتْ صَوْتَ رَجُلٍ يَسْتَأْذِنُ فِي بَيْتِ حَفْصَةَ. قَالَتْ عَائِشَةُ: فَقُلْتُ، يَا رَسُولَ اللَّهِ، أُرَاهُ فُلَانًا لِعَمِّ حَفْصَةَ مِنَ الرَّضَاعَةِ. قَالَتْ عَائِشَةُ: يَا رَسُولَ اللَّهِ، هَذَا رَجُلٌ يَسْتَأْذِنُ فِي بَيْتِكَ. قَالَتْ: فَقَالَ رَسُولُ اللَّهِ ﷺ: «أُرَاهُ فُلَانًا لِعَمِّ حَفْصَةَ مِنَ الرَّضَاعَةِ».

فَقَالَتْ عَائِشَةُ: لَوْ كَانَ فُلَانٌ حَيًّا، لِعَمِّهَا مِنَ الرَّضَاعَةِ، دَخَلَ عَلَيَّ؟ فَقَالَ رَسُولُ اللَّهِ ﷺ: «نَعَمْ، إِنَّ الرَّضَاعَةَ تُحَرِّمُ مَا يَحْرُمُ مِنَ الْوِلَادَةِ».