I divorced my wife while she was in the state of menses. 'Umar (Allah he pleased wish him) came toAllah's Apostle ﷺ and made mention of that to him, whereupon Allah's Apostle ﷺ told that be should take her back, and when she is pure he may divorce her. if he would so wish. I (one of the narrators) said to Ibn 'Umar (Allah be pleased with them): Did you count (this pronouncement of divorce) in her case? He said: What (after all) prevents him from doing so? Do you find him (Ibn Umar) either helpless or foolish? (Using translation from Muslim 1471n)
سَمِعْتُ ابْنَ عُمَرَ يَقُولُ طَلَّقْتُ امْرَأَتِي وَهِيَ حَائِضٌ فَأَتَى عُمَرُ النَّبِيَّ ﷺ فَذَكَرَ ذَلِكَ لَهُ فَقَالَ لِيُرَاجِعْهَا فَإِذَا طَهُرَتْ فَإِنْ شَاءَ فَلْيُطَلِّقْهَا قَالَ فَقُلْتُ لِابْنِ عُمَرَ أَفَتَحْتَسِبُ بِهَا؟ قَالَ مَا يَمْنَعُهُ نَعَمْ أَرَأَيْتَ إِنْ عَجَزَ وَاسْتَحْمَقَ