Zav

In Torah terminology, the Hebrew word zav (lit. "flow") is a state of ritual impurity arising from abnormal seminal discharge from the male sexual organ. Purification requirements for the zav include counting seven days without seminal discharge, immersion in a spring, and bringing certain korbanot (sacrifices).

In the realm of tumah and taharah law, the zav has the ability to create a midras and is required to abstain from entering specific areas of the Temple mount.

The Hebrew verb stem zuv (Hebrew זוּב) in the Qal zava (זָבָה) simply means to flow, as in "a land flowing with milk and honey".

The initial commandments regarding the zav were given to the Israelites during the second year after the Exodus from Egypt;

Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue (זָב), and whosoever is defiled by the dead:

The specific law governing zav status is written is the book of Leviticus;

And if a woman have an issue (זָבָה), and her issue (זֹבָהּ) in her flesh be blood, she shall be put apart seven days: and whosoever toucheth her shall be unclean until the evening.

Maimonides describes the zav state as the weakening of the male reproductive system while the general health of the man is normal. The semen of the otherwise healthy man oozes out without stimulation, erection, or pleasure. The color of the discharge has a reddish hue and has a thin consistency.

Abraham ibn Ezra mentions that zav status can either be abnormal discharge or the complete loss of ejaculation ability.

The above-mentioned laws of zav are applicable if the discharge in question had happened at least three times, whether thrice in one day, or over consecutive days, although certain laws of tumah are applicable after the first and second discharges (Mishnah, Zavim, 1). The zav is quantified as an Av HaTumah, something able to transfer uncleanliness. In addition, his actual zav discharge, saliva, semen, and urine are also deemed to have Av HaTumah status.

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