(13) باب مَنْ جَعَلَ عِتْقَ الأَمَةِ صَدَاقَهَا
Narrated Anas bin Malik:
Allah's Messenger (ﷺ) manumitted Safiyya and regarded her manumission as her Mahr.
Reference: Sahih al-Bukhari 5086
In-book reference: Book 67, Hadith 24
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 62, Hadith 23