What is the legal ruling regarding the moisture present in a woman's private parts (farj)?
Chapter on Praying with Impurity and Other Matters
Al-Mughni
Book of Prayer
Primary text
There are two primary opinions concerning the purity of the moisture from a woman's private parts. The first opinion asserts that it is impure (najis) because it does not originate the child, thus resembling prostatic fluid (madhy). The second opinion declares it pure (tahir). This latter view is supported by the action of Aisha, who used to rub semen from the garment of the Messenger of Allah (peace be upon him). Since semen originates from sexual intercourse and the Prophet never experienced a nocturnal emission (ihtilam), this moisture must be in contact with the woman's genital moisture. Furthermore, ruling the woman's private part as impure would necessitate ruling her semen as impure, as semen exits from that area and would thus be contaminated by the moisture.
Supporting text
The view held by the Qadi is that any moisture emanating during sexual intercourse is impure because it cannot be separated from prostatic fluid (madhy), which is inherently impure. This reasoning is refuted because when sexual arousal is intense, semen is expelled without the accompanying madhy, similar to the state during a nocturnal emission.