بُلُوغُ الْمَرَامِ
Bulugh al-Maram 1129
Marriage
وَعَنْهَا قَالَتْ: { جَاءَتْ سَهْلَةُ بِنْتُ سُهَيْلٍ. فَقَالَتْ: يَا رَسُولَ اَللَّهِ! إِنَّ سَالِمًا مَوْلَى أَبِي حُذَيْفَةَ مَعَنَا فِي بَيْتِنَا, وَقَدْ بَلَغَ مَا يَبْلُغُ اَلرِّجَالُ. قَالَ: أَرْضِعِيهِ. تَحْرُمِي عَلَيْهِ . } رَوَاهُ مُسْلِمٌ [1] .
Narrated ['Aishah (RA)]: Sahlah (RA) daughter of Suhail (RA) came and said, "O Allah's Messenger (ﷺ) , Salim the manumitted slave of Abu Hudhaifah lives with us in our house; and he has attained what men attain (i.e. puberty)." He said, "Suckle him so you would become unlawful to him (in marriage)." [Reported by Muslim].
Sunnah.com reference: Book 8, Hadith 193