He heard Abdul-Rahman bin Ayman, the freed slave of Izzah, ask Ibn Umar, while Abu Zubayr was listening to this,"What is your view concerning a man who divorces his wife while she is menstruating?"Ibn Umar replied, "Ibn Umar divorced his wife while she was menstruating during the lifetime of the Messenger of Allah ﷺ, so Umar asked the Messenger of Allah ﷺ about it, saying, 'Abdullah bin Umar has divorced his wife while she was menstruating.' The Prophet ﷺ told him that he should take her back, so he returned her to him, and he said, 'When she becomes pure, then let him divorce her or keep her.'"Ibn Umar added that the Prophet ﷺ recited, "Prophet, when you divorce women, divorce them at the beginning of their waiting period" [Talaq 65:1].
و حدثني هارون بن عبد الله حدثنا حجاج بن محمد قال قال ابن جريج
أنه سمع عبد الرحمن بن أيمن مولى عزة يسأل ابن عمر وأبو الزبير يسمع ذلك كيف ترى في رجل طلق امرأته حائضا فقال طلق ابن عمر امرأته وهي حائض على عهد رسول الله ﷺ فسأل عمر رسول الله ﷺ فقال إن عبد الله بن عمر طلق امرأته وهي حائض فقال له النبي ﷺ ليراجعها فردها وقال إذا طهرت فليطلق أو ليمسك قال ابن عمر وقرأ النبي ﷺ يا أيها النبي إذا طلقتم النساء فطلقوهن في قبل عدتهن