Hadith 10:8
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from Muhammad ibn Abd al-Rahman, the freed slave of the family of Talhah, from Salim, from Ibn Umar, that he divorced his wife while she was menstruating. Umar mentioned that to the Prophet, peace and blessings of Allah be upon him, and he said: "Command him to take her back, then let him divorce her while she is pure or pregnant."
حدثنا أبو بكر قال نا وكيع عن سفيان عن محمد بن عبد الرحمن مولى آل طلحة عن سالم عن بن عمر أنه طلق امرأته وهي حائض فذكر ذلك عمر للنبي صلى الله عليه وسلم فقال مره فليراجعها ثم ليطلقها طاهرا أو حاملا