صحيح البخاري Sahih Bukhari كتاب النكاح The Book of (The Wedlock)
بَابُ إِنْكَاحِ الرَّجُلِ وَلَدَهُ الصِّغَارَ:

(39) Chapter. Giving one’s young children in marriage (is permissible).

1 hadith
Hadith 5133
حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ ، حَدَّثَنَا سُفْيَانُ ، عَنْ هِشَامٍ ، عَنْ أَبِيهِ ، عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا ، " أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ تَزَوَّجَهَا وَهِيَ بِنْتُ سِتِّ سِنِينَ ، وَأُدْخِلَتْ عَلَيْهِ وَهِيَ بِنْتُ تِسْعٍ ، وَمَكَثَتْ عِنْدَهُ تِسْعًا " .
Narrated `Aisha: that the Prophet married her when she was six years old and he consummated his marriage when she was nine years old, and then she remained with him for nine years (i.e., till his death).
Hadith Reference Sahih Bukhari / The Book of (The Wedlock) / Hadith: 5133
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة