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." (AR)
USC-MSA web (English) reference: Book 20, Hadith 165 (AR)
Arabic reference (AR): Book 20, Hadith 867 (AR)