حَدَّثَنَا يَحْيَى عَنْ عُبَيْدِ اللَّهِ أَخْبَرَنِي نَافِعٌ عَنِ ابْنِ عُمَرَ أَنَّهُ طَلَّقَ امْرَأَتَهُ وَهِيَ حَائِضٌ فَأَتَى عُمَرُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَاسْتَفْتَاهُ فَقَالَ مُرْ عَبْدَ اللَّهِ فَلْيُرَاجِعْهَا حَتَّى تَطْهُرَ مِنْ حَيْضَتِهَا هَذِهِ ثُمَّ تَحِيضَ حَيْضَةً أُخْرَى فَإِذَا طَهُرَتْ فَلْيُفَارِقْهَا قَبْلَ أَنْ يُجَامِعَهَا أَوْ لِيُمْسِكْهَا فَإِنَّهَا الْعِدَّةُ الَّتِي أُمِرَ أَنْ تُطَلَّقَ لَهَا النِّسَاءُ
مسند امام احمد بن حنبل · Hadith 5164
It was narrated from Ibn Umar that he divorced his wife when she was menstruating, and 'Umar went to the Prophet (PBUH) and consulted him (about that). He said: "Tell him to take her back, then wait until she has become pure from this period, then has another period, then when she has become pure again, he may divorce her before he has intercourse with her or he may keep her. That is the 'iddah (prescribed periods) at which Allah has enjoined the divorce of Women.”
Sanad
حَدَّثَنَا يَحْيَى عَنْ عُبَيْدِ اللَّهِ أَخْبَرَنِي نَافِعٌ عَنِ ابْنِ عُمَرَ