عَنْ نَافِعٍ أَنَّ عَبْدَ اللَّهِ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ تَطْلِيقَةً وَاحِدَةً عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ، فَقَالَ عُمَرُ: يَا رَسُولَ اللَّهِ! إِنَّ عَبْدَ اللَّهِ طَلَّقَ امْرَأَتَهُ تَطْلِيقَةً وَاحِدَةً وَهِيَ حَائِضٌ فَأَمَرَهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَنْ يُرَاجِعَهَا وَيُمْسِكَهَا حَتَّى تَطْهُرَ ثُمَّ تَحِيضَ عِنْدَهُ حَيْضَةً أُخْرَى ثُمَّ يُمْهِلَهَا حَتَّى تَطْهُرَ مِنْ حَيْضَتِهَا، فَإِنْ أَرَادَ أَنْ يُطَلِّقَهَا فَلْيُطَلِّقْهَا حِينَ تَطْهُرُ قَبْلَ أَنْ يُجَامِعَهَا فَتِلْكَ الْعِدَّةُ الَّتِي أَمَرَ اللَّهُ تَعَالَى أَنْ يُطَلَّقَ لَهَا النِّسَاءُ، وَكَانَ عَبْدُ اللَّهِ إِذَا سُئِلَ عَنْ ذَلِكَ فَقَالَ لِأَحَدِهِمْ: أَمَّا أَنْتَ طَلَّقْتَ امْرَأَتَكَ مَرَّةً أَوْ مَرَّتَيْنِ، فَإِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَمَرَنِي بِهَا، فَإِنْ كُنْتَ طَلَّقْتَهَا ثَلَاثًا فَقَدْ حَرُمَتْ عَلَيْكَ حَتَّى تَنْكِحَ زَوْجًا غَيْرَكَ وَعَصَيْتَ اللَّهَ تَعَالَى فِيمَا أَمَرَكَ مِنْ طَلَاقِ امْرَأَتِكَ
It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he gave his wife a divorce while she was in her menstrual period. The Noble Prophet (peace and blessings be upon him) ordered him to take her back and keep her with him until she becomes pure, then when she gets her next period, and then becomes pure from it, then if he intends to divorce her, he should divorce her before having intercourse with her. This is the waiting period (iddah) regarding which Allah Almighty has commanded to give divorce. When Sayyiduna Abdullah (may Allah be pleased with him) was asked about this, he would say: Have you given your wife one or two divorces? As for me, the Noble Prophet (peace and blessings be upon him) ordered me to take her back. And if you have given your wife three divorces, then she has become unlawful for you. Now, for her to become lawful for you again, she must marry another man besides you. Yes, you have disobeyed Allah Almighty by giving divorce in an incorrect manner.