Sayyidah Umaymah bint Ruqayqah (may Allah be pleased with her) said: I came with some women to the Prophet (peace and blessings be upon him) to give the pledge of allegiance, and he (peace and blessings be upon him) laid upon us the same condition that is in the Qur'an: "Do not steal, do not commit adultery, do not kill your children, and do not bring a slander that you have invented." Then he (peace and blessings be upon him) said to us: "As far as you are able and have the strength." We said: Allah and His Messenger are more merciful to us than we are to ourselves. We said: O Messenger of Allah, will you not shake hands with us? He (peace and blessings be upon him) said: "I do not shake hands with women. My word to one woman is the same as my word to a hundred women."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20841