Sahih al-Bukhari 3255
Book 59: Beginning of Creation · Narrated by Al-Bara (bin Azib)
Arabic
حَدَّثَنَا حَجَّاجُ بْنُ مِنْهَالٍ، حَدَّثَنَا شُعْبَةُ، قَالَ عَدِيُّ بْنُ ثَابِتٍ أَخْبَرَنِي قَالَ سَمِعْتُ الْبَرَاءَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ لَمَّا مَاتَ إِبْرَاهِيمُ قَالَ " إِنَّ لَهُ مُرْضِعًا فِي الْجَنَّةِ ".
English translation
Narrated Al-Bara (bin Azib):The Prophet, after the death of his son Ibrahim, said, "There is a wet-nurse for him (i.e. Ibrahim) in Paradise
Reference: Sahih al-Bukhari 3255, Book of Beginning of Creation. English translation by Dr. Muhammad Muhsin Khan.