Musannaf Ibn Abi Shaybah

Hazrat Umar bin Khattab (may Allah be pleased with him) said that if I had the authority to fix the waiting period (‘iddah) of a slave woman as one and a half menstrual cycles, I would certainly have done so. A man said to him that if you fix their waiting period as one and a half months, it would be better. Upon this, Hazrat Umar (may Allah be pleased with him) remained silent.