"Salim has reached the age of manhood, and understands what men understand. He enters upon us, and I think that Abu Hudhaifah is not happy about that." The Prophet said: "Breast-feed him, and you will become unlawful to him." So she breast-fed him, and the displeasure of Abu Hudhaifah disappeared. She came back to him and said: "I breast-fed him and the displeasure of Abu Hudhaifah has disappeared."  

أَنَّ سَالِمًا مَوْلَى أَبِي حُذَيْفَةَ كَانَ مَعَ أَبِي حُذَيْفَةَ وَأَهْلِهِ فِي بَيْتِهِمْ فَأَتَتْ بِنْتُ سُهَيْلٍ إِلَى النَّبِيِّ ﷺ فَقَالَتْ إِنَّ سَالِمًا قَدْ بَلَغَ مَا يَبْلُغُ الرِّجَالُ وَعَقَلَ مَا عَقَلُوهُ وَإِنَّهُ يَدْخُلُ عَلَيْنَا وَإِنِّي أَظُنُّ فِي نَفْسِ أَبِي حُذَيْفَةَ مِنْ ذَلِكَ شَيْئًا فَقَالَ النَّبِيُّ ﷺ أَرْضِعِيهِ تَحْرُمِي عَلَيْهِ فَأَرْضَعْتُهُ فَذَهَبَ الَّذِي فِي نَفْسِ أَبِي حُذَيْفَةَ فَرَجَعْتُ إِلَيْهِ فَقُلْتُ إِنِّي قَدْ أَرْضَعْتُهُ فَذَهَبَ الَّذِي فِي نَفْسِ أَبِي حُذَيْفَةَ  

Salim has attained (purbety) as men attain, and he understands what they understand, and he enters our house freely, I, however, perceive that something (rankles) in the heart of Abu Hudhaifa, whereupon Allah's Apostle ﷺ said to her: Suckle him and you would become unlawful for him, and (the rankling) which Abu Hudhaifa feels in his heart will disappear. She returned and said: So I suckled him, and what (was there) in the heart of Abu Hudhaifa disappeared. (Using translation from Muslim 1453b)   

أَنَّ سَالِمًا مَوْلَى أَبِي حُذَيْفَةَ كَانَ مَعَ أَبِي حُذَيْفَةَ وَأَهْلِهِ فِي بَيْتِهِمْ فَأَتَتْ ابْنَةُ سُهَيْلٍ النَّبِيَّ ﷺ فَقَالَتْ إِنَّ سَالِمًا قَدْ بَلَغَ مَا بَلَغَ الرِّجَالُ وَعَقَلَ مَا عَقَلُوا وَإِنَّهُ يَدْخُلُ عَلَيْنَا وَإِنِّي أَظُنُّ فِي نَفْسِ أَبِي حُذَيْفَةَ مِنْ ذَلِكَ شَيْئًا فَقَالَ النَّبِيُّ ﷺ «أَرْضِعِيهِ تَحْرُمِي عَلَيْهِ فَذَهَبَ الَّذِي فِي نَفْسِ أَبِي حُذَيْفَةَ»