Hadith 6:508
Hafs narrated to us, from his paternal uncle Ghannam ibn Talq, who said: Abu Burdah witnessed [the marriage of] a female slave of his, so he ordered the Imam of the neighborhood, and he stepped forward [to lead the prayer/officiate] over her.
حدثنا حفص عن عمه غنام بن طلق قال شهد أبو بردة مولاة له فأمر إمام الحي فتقدم عليها