Sahih al-Bukhari Book 68, Hadith 7
similarly as above (182).
The Prophet (ﷺ) married Umaima bint Sharahil, and when she was brought to him, he stretched his hand towards her. It seemed that she disliked that, whereupon the Prophet (ﷺ) ordered Abu Usaid to prepare her and to provide her with two white linen dresses.
I asked Ibn `Umar,"(What is said regarding) a man divorces his wife during her period?" He said, "Do you know Ibn `Umar? Ibn `Umar divorced his wife while she was menstruating. `Umar then went to the Prophet (ﷺ) and mentioned that to him. The Prophet (ﷺ) ordered him to take her back and when she became clean, he could divorce her if he wanted." I asked (Ibn `Umar), "Was that divorce counted as one legal divorce?" He said, "If one becomes helpless and foolish (will he be excused? Of course not). "