It was narrated from Ibn 'Umar that: he divorced his wife when she was menstruating, and 'Umar mentioned that to the Prophet ( صلی اللہ علیہ وسلم ). He said: "Tell him to take her back then divorce her when she is pure (not menstruating) or pregnant."

It was narrated that Ibn 'Umar said: "I divorced my wife when she was menstruating. 'Umar mentioned that to the Messenger of Allah and he said: 'Tell him to take her back until she becomes pure (i.e., her period ends), then she has her period (again), then she becomes pure (again), then if he wishes he may divorce her before having sexual relations with her, and if he wishes he may keep her. This is the waiting period that Allah has enjoined.'"

It was narrated that Yunus bin Jubair, Abu Ghallab, said: "I asked Ibn 'Umar about a man who divorced his wife when she was menstruating. He said: 'Do you know 'Abdullah bin 'Umar? He divorced his wife when she was menstruating then 'Umar came to the Prophet ( صلی اللہ علیہ وسلم ) (and told him what had happened). He ordered him to take her back.' I said: 'Will that be counted (as a divorce)?' He said: 'Do You think he was helpless and behaving foolishly? [i.e., Yes, it counts (as a divorce).] ."'