Sunan an-Nasa'i 3400

Yaqub bin Ibrahim narrated to us; Ibn Ulaiyyah narrated to us, from Yunus, from Muhammad bin Sirin, from Yunus bin Jubayr, who said: I asked Ibn Umar about a man who had divorced his wife while she was menstruating. He said, ‘Do you know Abdullah bin Umar? He divorced his wife while she was menstruating, and Umar went to the Prophet to ask him about it. He ordered him to take her back and then begin counting her waiting period anew.’ I asked him, ‘When a man divorces his wife while she is menstruating, does he count that divorce?’ He replied, ‘Enough! What if he were incapable and acted foolishly?’