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»