Yunus bin Jubayr said: I heard Sayyiduna Abdullah bin Umar (may Allah be pleased with him) say: I divorced my wife while she was menstruating, so Sayyiduna Umar (may Allah be pleased with him) informed the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) said: "Let him take her back and divorce her in a state of purity." The narrator said: I asked Sayyiduna Abdullah bin Umar (may Allah be pleased with him): "Did you count it?" He said: "What is there to prevent it? What do you think, if he was helpless or foolish?"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 14920