Hadith 10:671
Abu Bakr narrated to us, he said: Abd al-A’la narrated to us, from Sa’id, from Qatadah, who said: He may have intercourse with her once during every period of purity, then he must abstain until she becomes pure. If her pregnancy becomes apparent, she is separated [from him].
حدثنا أبو بكر قال نا عبد الأعلى عن سعيد عن قتادة قال يقع عليها عند كل طهر مرة ثم يمسك حتى تطهر فإذا استبان حملها بانت