Ibn ʿUmar said: "I divorced my wife while she was menstruating. ʿUmar mentioned that to the Prophet . The Prophet ﷺ said, (to my father), "Let your son take her back." I asked (Ibn ʿUmar), "Is such a divorce counted (i.e. as one legal divorce)?" Ibn ʿUmar said, "Of course." Narrated Yunus bin Jubair: Ibn ʿUmar said, "The Prophet ﷺ said to ʿUmar, 'Order him (Ibn ʿUmar) to take her back.' " I asked, "Is such a divorce counted (as one legal divorce)?" Ibn ʿUmar said, "What do you think if someone becomes helpless and foolish?"  

طَلَّقَ ابْنُ عُمَرَ امْرَأَتَهُ وَهْىَ حَائِضٌ فَذَكَرَ عُمَرُ لِلنَّبِيِّ ﷺ فَقَالَ لِيُرَاجِعْهَا قُلْتُ تُحْتَسَبُ قَالَ فَمَهْ وَعَنْ قَتَادَةَ عَنْ يُونُسَ بْنِ جُبَيْرٍ عَنِ ابْنِ عُمَرَ قَالَ مُرْهُ فَلْيُرَاجِعْهَا قُلْتُ تُحْتَسَبُ قَالَ أَرَأَيْتَ إِنْ عَجَزَ وَاسْتَحْمَقَ  

(Divorcing my wife during her menses) was counted as one legal divorce.  

حُسِبَتْ عَلَىَّ بِتَطْلِيقَةٍ