It is narrated from Hazrat Aisha (may Allah be pleased with her) that a mukhannath (effeminate man) used to come to the pure wives of the Prophet (peace and blessings be upon him). People thought that he had no interest in women's matters, but one day he was sitting with one of the noble wives of the Prophet (peace and blessings be upon him) when the Prophet (peace and blessings be upon him) also arrived. At that time, the mukhannath was describing a woman, saying that she comes with four and returns with eight. The Prophet (peace and blessings be upon him) said, "I did not think that he would know such things." Therefore, from today he should never come to you. Consequently, the wives of the Prophet (peace and blessings be upon him) began to observe veiling from him.