EXOD445 Masturbation to obtain sperm [for artificial insemination] is strongly condemned by Rabbi [Moshe] Feinstein, based upon the following Talmudic passage: "… Rabbi Eleazar stated: Who are referred to in the scriptural text "Your hands are full of blood" (Isaiah 1:15)? Those who commit masturbation with their hands. It was taught at the school of Rabbi Ishmael "That shalt not commit adultery" [this verse] implies that thou shalt not practice masturbation either with hand or with foot ...". (Niddah 13b).