´It was narrated from Ibn 'Umar that he divorced his wife while she was menstruating. He mentioned that to the Prophet and he said:` "Tell him to take her back, then divorce her while she is pure (not menstruating) or pregnant."
Hadith ReferenceSunan an-Nasa'i / The Book of Divorce / Hadith: 3426
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم