"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."
طَلَّقْتُ امْرَأَتِي وَهِيَ حَائِضٌ فَأَتَى النَّبِيَّ ﷺ عُمَرُ فَذَكَرَ لَهُ ذَلِكَ فَقَالَ النَّبِيُّ ﷺ مُرْهُ أَنْ يُرَاجِعَهَا فَإِذَا طَهُرَتْ يَعْنِي فَإِنْ شَاءَ فَلْيُطَلِّقْهَا قُلْتُ لاِبْنِ عُمَرَ فَاحْتَسَبْتَ مِنْهَا فَقَالَ مَا يَمْنَعُهَا أَرَأَيْتَ إِنْ عَجَزَ وَاسْتَحْمَقَ