"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  

"Tell him to take her back until she menstruates again, then when she becomes pure, if he wants he may divorce her and if he wants he may keep her. This is the divorce that Allah has enjoined. Allah, the Mighty and Sublime, says: 'The divorce is twice, after that, either you retain her on reasonable terms or release her with kindness.'"  

عَنِ ابْنِ عُمَرَ قَالُوا إِنَّ ابْنَ عُمَرَ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَذَكَرَ عُمَرُ ؓ لِلنَّبِيِّ ﷺ فَقَالَ مُرْهُ فَلْيُرَاجِعْهَا حَتَّى تَحِيضَ حَيْضَةً أُخْرَى فَإِذَا طَهُرَتْ فَإِنْ شَاءَ طَلَّقَهَا وَإِنْ شَاءَ أَمْسَكَهَا فَإِنَّهُ الطَّلاَقُ الَّذِي أَمَرَ اللَّهُ ﷻ بِهِ قَالَ تَعَالَى { فَطَلِّقُوهُنَّ لِعِدَّتِهِنَّ }  

"If it is the first or second divorce, the Messenger of Allah would tell him to take her back and keep her until she has menstruated again and purified herself, then divorce her before having intercourse with her. But if it was three simultaneous divorces, then you have disobeyed Allah with regard to the way in which divorce should be conducted and your wife has become irrevocably divorced."  

عَنِ الرَّجُلِ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَيَقُولُ أَمَّا إِنْ طَلَّقَهَا وَاحِدَةً أَوِ اثْنَتَيْنِ فَإِنَّ رَسُولَ اللَّهِ ﷺ أَمَرَهُ أَنْ يُرَاجِعَهَا ثُمَّ يُمْسِكَهَا حَتَّى تَحِيضَ حَيْضَةً أُخْرَى ثُمَّ تَطْهُرَ ثُمَّ يُطَلِّقَهَا قَبْلَ أَنْ يَمَسَّهَا وَأَمَّا إِنْ طَلَّقَهَا ثَلاَثًا فَقَدْ عَصَيْتَ اللَّهَ فِيمَا أَمَرَكَ بِهِ مِنْ طَلاَقِ امْرَأَتِكَ وَبَانَتْ مِنْكَ امْرَأَتُكَ  

It was narrated from Ibn 'Umar that he divorced his wife when she was menstruating, and the Messenger of Allah told him to take her back.  

أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَأَمَرَهُ رَسُولُ اللَّهِ ﷺ فَرَاجَعَهَا  

"Do you know 'Abdullah bin 'Umar?" He said: "Yes." He said: "He divorced his wife when she was menstruating, and 'Umar went to the Prophet and told him about that. He ordered him to take her back until she became pure," and I did not hear him adding anything to that.  

فَإِنَّهُ طَلَّقَ امْرَأَتَهُ حَائِضًا فَأَتَى عُمَرُ النَّبِيَّ ﷺ فَأَخْبَرَهُ الْخَبَرَ فَأَمَرَهُ أَنْ يُرَاجِعَهَا حَتَّى تَطْهُرَ وَلَمْ أَسْمَعْهُ يَزِيدُ عَلَى هَذَا  

"The Messenger of Allah- had divorced Hafsah, then he took her back." And Allah knows best.  

أَنَّ النَّبِيَّ ﷺ وَقَالَ عَمْرٌو إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ طَلَّقَ حَفْصَةَ ثُمَّ رَاجَعَهَا وَاللَّهُ أَعْلَمُ