Abdullah bin Umar reported,

Ibn Umar said, "I divorced my wife while she was menstruating. Umar went to the Prophet ﷺ and told him about it, and he said, 'Tell him to take her back, and then, when she becomes pure, let him divorce her.'"I asked Ibn Umar, "So was that pronouncement of divorce counted against you?"He replied, "Of course. What else?"

Muslim 3668

Sahih

و حدثنيه يحيى بن حبيب حدثنا خالد بن الحارث ح و حدثنيه عبد الرحمن بن بشر حدثنا بهز قالا حدثنا شعبة بهذا الإسناد غير أن في حديثهما ليرجعها وفي حديثهما قال قلت له أتحتسب بها قال فمه

مسلم 3668صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Divorce
Chapter
Prohibition of divorcing a menstruating woman without her consent, and that if one does so the divorce still takes effect and he is commanded to take her back
Numbering
Darussalam 3668
Muslim 3668