Hadith 10:851
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Matar, from Muhammad ibn Ka’b, he said: "Ila' (the oath of abstention from one's wife) is nothing; he is to be stopped."
حدثنا أبو بكر قال نا وكيع عن مطر عن محمد بن كعب قال الإيلاء ليس بشيء يوقف