Is it mentioned in Sahih al-Bukhari that Lady Aisha used to pray Tarawih behind her freed slave Dhakwan, who would recite from a mus'haf, and what is the part number and hadith number that refers to this?

The narration mentioned in the Book of Adhan, chapter "The Imamate of a Slave," in Sahih al-Bukhari, is usually found in the first part of multi-volume editions, or at the beginning of the book in single-volume editions. Al-Bukhari narrated it in a suspended form (without a chain of narration). Al-Hafiz Ibn Hajar clarified that Abu Dawud and others have connected it.