question #3 Sahih al-Bukhari 5158, Book 67, Hadith 93 : What are the implications of age in marriage according to Islamic teachings and historical practices?

The Prophet (ﷺ) wrote the (marriage contract) with `Aisha while she was six years old and consummated
his marriage with her while she was nine years old and she remained with him for nine years (i.e. till
his death).