That ʿAbdullah bin ʿUmar told him that he had divorced his wife while she was in her menses so ʿUmar informed Messenger of Allah ﷺ of that. Messenger of Allah ﷺ became very angry at that and said, "(Ibn ʿUmar must return her to his house and keep her as his wife till she becomes clean and then menstruates and becomes clean again, whereupon, if he wishes to divorce her, he may do so while she is still clean and before having any sexual relations with her, for that is the legally prescribed period for divorce as Allah has ordered."  

أَخْبَرَهُ أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهْىَ حَائِضٌ فَذَكَرَ عُمَرُ لِرَسُولِ اللَّهِ ﷺ فَتَغَيَّظَ فِيهِ رَسُولُ اللَّهِ ﷺ ثُمَّ قَالَ لِيُرَاجِعْهَا ثُمَّ يُمْسِكْهَا حَتَّى تَطْهُرَ ثُمَّ تَحِيضَ فَتَطْهُرَ فَإِنْ بَدَا لَهُ أَنْ يُطَلِّقَهَا فَلْيُطَلِّقْهَا طَاهِرًا قَبْلَ أَنْ يَمَسَّهَا فَتِلْكَ الْعِدَّةُ كَمَا أَمَرَهُ اللَّهُ  

That he had divorced his wife during her menses. ʿUmar mentioned that to the Prophet. Allah's Apostle became angry and said, "He must take her back (his wife) and keep her with him till she becomes clean from her menses and then to wait till she gets her next period and becomes clean again from it and only then, if he wants to divorce her, he may do so."  

أَخْبَرَهُ أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهْىَ حَائِضٌ فَذَكَرَ عُمَرُ لِلنَّبِيِّ ﷺ فَتَغَيَّظَ فِيهِ رَسُولُ اللَّهِ ﷺ ثُمَّ قَالَ لِيُرَاجِعْهَا ثُمَّ لْيُمْسِكْهَا حَتَّى تَطْهُرَ ثُمَّ تَحِيضَ فَتَطْهُرَ فَإِنْ بَدَا لَهُ أَنْ يُطَلِّقَهَا فَلْيُطَلِّقْهَا  

"Tell 'Abdullah to take her back, then, when she has performed Ghusl, let him leave her alone, until she menstruates (again). Then, when she performs Ghusl following that second period, he should not touch her until he divorces her. And if he wants to keep her, then let him keep her. That is the time when Allah has stated that women may be divorced."  

أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ تَطْلِيقَةً فَانْطَلَقَ عُمَرُ فَأَخْبَرَ النَّبِيَّ ﷺ بِذَلِكَ فَقَالَ لَهُ النَّبِيُّ ﷺ مُرْ عَبْدَ اللَّهِ فَلْيُرَاجِعْهَا فَإِذَا اغْتَسَلَتْ فَلْيَتْرُكْهَا حَتَّى تَحِيضَ فَإِذَا اغْتَسَلَتْ مِنْ حَيْضَتِهَا الأُخْرَى فَلاَ يَمَسَّهَا حَتَّى يُطَلِّقَهَا فَإِنْ شَاءَ أَنْ يُمْسِكَهَا فَلْيُمْسِكْهَا فَإِنَّهَا الْعِدَّةُ الَّتِي أَمَرَ اللَّهُ ﷻ أَنْ تُطَلَّقَ لَهَا النِّسَاءُ  

[Machine] So 'Umar mentioned that to 'Umar, and 'Umar went to the Messenger of Allah ﷺ and informed him. The Messenger of Allah ﷺ said: "Let him keep her until she menstruates, other than this menstruation, then she purifies herself. If it appears to him that he should divorce her, then let him divorce her as Allah the Mighty and Majestic has commanded him. And if it appears to him that he should keep her, then let him keep her."  

فَذَكَرَ ذَلِكَ إِلَى عُمَرَ فَانْطَلَقَ عُمَرُ إِلَى رَسُولِ اللهِ ﷺ فَأَخْبَرَهُ فَقَالَ رَسُولُ اللهِ ﷺ لِيُمْسِكْهَا حَتَّى تَحِيضَ غَيْرَ هَذِهِ الْحَيْضَةِ ثُمَّ تَطْهُرَ فَإِنْ بَدَا لَهُ أَنْ يُطَلِّقَهَا فَلْيُطَلِّقْهَا كَمَا أَمَرَهُ اللهُ ﷻ وَإِنْ بَدَا لَهُ أَنْ يُمْسِكَهَا فَلْيُمْسِكْهَا  

"Tell 'Abdullah to take her back, then, when she has performed Ghusl, let him leave her alone, until she menstruates (again). Then, when she performs Ghusl following that second period, he should not touch her until he divorces her. And if he wants to keep her, then let him keep her. That is the time when Allah has stated that women may be divorced." (Using translation from Nasāʾī 3396)  

أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ تَطْلِيقَةً فَانْطَلَقَ عُمَرُ فَأَخْبَرَ النَّبِيَّ ﷺ بِذَلِكَ فَقَالَ لَهُ النَّبِيُّ ﷺ «مُرْ عَبْدَ اللهِ فَلْيُرَاجِعْهَا فَإِذَا اغْتَسَلَتْ فَلْيَتْرُكْهَا حَتَّى تَحِيضَ فَإِذَا اغْتَسَلَتْ مِنْ حَيْضَتِهَا الْأُخْرَى فَلَا يَمَسَّهَا حَتَّى يُطَلِّقَهَا فَإِنْ شَاءَ أَنْ يُمْسِكَهَا فَلْيُمْسِكْهَا فَإِنَّهَا الْعِدَّةُ الَّتِي أَمَرَ اللهُ أَنْ تُطَلَّقَ لَهَا النِّسَاءُ»  

‘Abd Allah (bin Umar) said that he divorced his wife while she was menstruating. ‘Umar mentioned the matter to the Messenger of Allah ﷺ. The Messenger of Allah ﷺ became angry and said “Command him, he must take her back and keep her back till she is purified, then has another menstrual period and is purified. Then if he desires he may divorce her during the period of purity before he has intercourse with her. This is the divorce for waiting period as commanded by Allaah, the Exalted. (Using translation from Abū Dāʾūd 2182)   

أَخْبَرَهُ أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَذَكَرَ ذَلِكَ عُمَرُ لِرَسُولِ اللهِ ﷺ فَتَغَيَّظَ فِيهِ رَسُولُ اللهِ ﷺ ثُمَّ قَالَ رَسُولُ اللهِ ﷺ لِيُرَاجِعْهَا ثُمَّ لِيُمْسِكْهَا حَتَّى تَطْهُرَ ثُمَّ تَحِيضَ ثُمَّ تَطْهُرَ فَإِنْ بَدَا لَهُ أَنْ يُطَلِّقَهَا فَلْيُطَلِّقْهَا طَاهِرًا قَبْلَ أَنْ يَمَسَّهَا فَتِلْكَ الْعِدَّةُ كَمَا أَمَرَ اللهُ ﷻ  

"عَنِ ابْنِ عُمرَ أَنَّهُ طَلَّقَ امْرأَتَهُ وَهِىَ حَائِضٌ، فَاسْتَفْتَى عُمَرُ رَسُولَ الله ﷺ فَقَالَ: مُرْ عَبْدَ الله فَلْيُرَاجِعهَا ثُم ليُمْسِكْهَا حَتَّى تَطْهُرَ، ثُمَّ تَحِيضَ فَتَطْهُرَ، فَإِنْ بَدَا لَهُ أَنْ يُطَلِّقَهَا فَليُطَلِّقَهَا طَاهِرًا قَبْلَ أَنْ يَمسَّهَا، فَتِلْكَ الْعِدّةُ الَّتِى أَمَرَ الله أَنْ يُطلّقَ لَهَا النَّسَاء".