Sayyidah Umaymah bint Ruqayqah (RA) reported that she offered the oath of allegiance to Allah’s Messenger with many women. He said to them, “To the best of your ability and strength.” She said, “Allah and His Messenger are more merciful to us than we are to ourselves.” She also said, “0 Messenger of Allah, Accept our pledgeofallegiance.”Sufyansaid, “She means handshake.” Allah’s Messenger said, “My word to a hundred women is like my word to one woman. (That is, “There is no need for a handshake, my word is enough).”
[Nisai 4187]