Fiqh-us-Sunnah Volume 1, Purification and Prayer, Fiqh 1.010A.

This is a white sticky fluid that flows from the sexual organs because of thinking about sexual intercourse or foreplay, and so on. The person is usually not aware of when exactly it is secreted. It comes from both the male and the female sexual organs, although the amount from the latter is usually more than the former’s. Scholars are agreed that it is impure. If it gets on the body, it is obligatory to wash it off. If it gets on the clothes, it suffices to sprinkle the area with water, as it is very hard to be completely protected from this impurity, especially for the young, single person. ‘Ali said, “I used to excrete mazhi, so I asked a man to ask the Messenger of Allah, upon whom be peace, about it. I was shy to do so because of my position with respect to his daughter (‘Ali was the Prophet’s son-in-law). He said, ‘Make ablution and wash your penis.” This is related by al-Bukhari and others. Sahl ibn Hanif said, “I used to suffer from excessive amounts of mazhi. I used to make lots of ghusl because of it. So I mentioned this to the Messenger of Allah, upon whom be peace, and he said, ‘It is sufficient to take a handful of water and sprinkle it over your clothes wherever the fluid appears.”

The hadith is related by Abu Dawud, Ibn Majah, and at-Tirmizhi. The latter says, “The hadith is hassan sahih. In the chain is Muhammad ibn Ishaq, who is considered weak when he relates in mu’an’an (handed-down) form because of his reputation as one who committed tadlis. But in this narration, he makes it clear that he heard the hadith directly.” Al-Athram narrated the same hadith with the wording, “I was bothered by a great deal of mazhi, so I went to the Prophet, upon whom be peace, and informed him of this. He said ‘It is sufficient for you to take a handful of water and sprinkle it over (the mazhi).”‘