Ibn 'Umar said:
I divorced my wife when she was menstruating. 'Umar went to the Prophet and told him about that. The Prophet said: 'Tell him to take her back, then when she becomes pure, if he wants to, let him divorce her.' I said to Ibn 'Umar: Did that count as one divorce? He said: Why not? What do you think if some becomes helpless and behaves foolishly.