Muwatta Malik, Book 20, Hadith 165 (USC-MSA)

Yahya related to me from Malik from Thawr ibn Zayd ad-Dili that lkrama, the mawla of Ibn Abbas, said, (and Thawr believed it to be from Abdullah ibn Abbas), "Someone who has intercourse with his wife before he has done the tawaf al-ifada should do an umra and sacrifice an animal."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ ثَوْرِ بْنِ زَيْدٍ الدِّيلِيِّ، عَنْ عِكْرِمَةَ، مَوْلَى ابْنِ عَبَّاسٍ قَالَ لاَ أَظُنُّهُ إِلاَّ عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، أَنَّهُ قَالَ الَّذِي يُصِيبُ أَهْلَهُ قَبْلَ أَنْ يُفِيضَ يَعْتَمِرُ وَيُهْدِي ‏.‏

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also referenced under: Book 20, Hadith 867 (In-Book)