Iyas bin Abi Dhubab says that the Messenger of Allah (peace and blessings be upon him) said: "Do not beat the female servants of Allah." Umar (may Allah be pleased with him) came to the Messenger of Allah (peace and blessings be upon him) saying that the women had become emboldened against their husbands, so he (peace and blessings be upon him) gave them permission, and they beat them. Then many women came to the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Tonight 70 women have come to the family of Muhammad (peace and blessings be upon him), all of them complaining about their husbands. You will not find those men to be the best among you."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14781