It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that a man married a woman from the Ansar tribe of Banu Ajlan. He spent the night with her, and in the morning he said that he did not find her to be a virgin. This matter was presented before the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) called the girl and asked her, and she said: Why not, I was indeed a virgin. The Prophet (peace and blessings be upon him) ordered both of them to perform li'an (mutual cursing) and had the girl given her dowry.
Hadith Referenceمسند احمد / ومن مسند بني هاشم / 2367
Hadith Gradingحکم دارالسلام:إسناده ضعيف، لتدليس محمد بن إسحاق