Yahya related to me from Malik from Thawr ibn Zayd ad-Dili thatlkrama, the mawla of Ibn Abbas, said, (and Thawr believed it to befrom Abdullah ibn Abbas), "Someone who has intercourse with his wifebefore he has done the tawaf al-ifada should do an umra and sacrificean animal."
USC-MSA web (English) reference: Book 20, Hadith 165
Arabic reference: Book 20, Hadith 867