It is narrated from a man of Thaqif that he heard Umar bin Khattab (may Allah be pleased with him) saying: "If I had the power, I would make her waiting period one and a half menstruations." Upon this, a man said: "You may make her waiting period one and a half months," so Umar (may Allah be pleased with him) remained silent.
Hadith Referenceمسند الإمام الشافعي / كتاب العدد والسكنى والنفقات / 1295
Hadith Takhrijإسناده ضعيف لإبهام شيخ عمرو بن أوس - اخرجه البيهقي : 425/7 - وفي المعرفة السنن والآثار له (4640) - وعبد الرزاق (12874) وابن ابي شيبة (18768)۔