Sahih Muslim Book - 18, Hadith - 3665

حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى وَابْنُ بَشَّارٍ قَالَ ابْنُ الْمُثَنَّى حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ قَتَادَةَ قَالَ سَمِعْتُ يُونُسَ بْنَ جُبَيْرٍ قَالَ سَمِعْتُ ابْنَ عُمَرَ يَقُولُ طَلَّقْتُ امْرَأَتِى وَهْىَ حَائِضٌ فَأَتَى عُمَرُ النَّبِىَّ -صلى الله عليه وسلم- فَذَكَرَ ذَلِكَ لَهُ فَقَالَ النَّبِىُّ -صلى الله عليه وسلم- « لِيُرَاجِعْهَا. فَإِذَا طَهَرَتْ فَإِنْ شَاءَ فَلْيُطَلِّقْهَا ». قَالَ فَقُلْتُ لاِبْنِ عُمَرَ أَفَاحْتَسَبْتَ بِهَا قَالَ مَا يَمْنَعُهُ. أَرَأَيْتَ إِنْ عَجَزَ وَاسْتَحْمَقَ

Ibn 'Umar said: "I divorced my wife while she was menstruating, and 'Umar went to the Prophet (s.a.w) and told him about that. The Prophet (s.a.w) said: 'Let him take her back, then when she becomes pure, if he wishes he may divorce her.' He (the narrator) said: "I said to Ibn 'Umar: 'Was that counted (as a divorce)?' He said: 'Why wouldn't it be? It must be counted even if he failed and acted foolishly."'