Musnad Ahmad 25:509

Ya'qub narrated to us, my father narrated to us, from Ibn Ishaq, who said: Talha ibn Nafi' mentioned from Sa'id ibn Jubayr, from Ibn Abbas, who said: A man married a woman from the Ansar, from the tribe of Banu 'Ajlan. He consummated the marriage with her and spent the night with her. When he reached the morning, he said: "I did not find her a virgin." Their matter was raised to the Messenger of Allah, peace and blessings of Allah be upon him. The Messenger of Allah, peace and blessings of Allah be upon him, summoned the young woman and asked her. She said: "Yes, I was indeed a virgin." He said: "The Messenger of Allah, peace and blessings of Allah be upon him, ordered them both to perform the imprecation (li'an), and he gave her the dowry."