Works : Islamic Laws
1597. If a person, who is observing fast, performs masturbation (Istimna), his fast becomes void (The explanation of istimna has been given in rule 1581/iii).
1598. If semen is discharged from the body of a person involuntarily, his fast does not become void.
1599. Even if a person observing fast knows that if he sleeps during the day time he will become Mohtalim (i.e. semen will be discharged from his body during sleep) it is permissible for him to sleep, even if he may not be inconvenienced by not sleeping. And if he becomes Mohtalim, his fast does not become void.
1600. If a person who is observing fast, wakes up from sleep while ejaculation is taking place, it is not obligatory on him to stop it.
1601. A fasting person who has become Mohtalim can urinate even if he knows that by urinating the remaining semen will flow from his body.
1602. If a fasting person who has become Mohtalim, knows that some semen has remained in his body and if he does not urinate before taking Ghusl, it will come out after Ghusl, he should on the basis of recommended precaution, urinate before taking Ghusl.
1603. A person who indulges in courtship with an intention to allow semen to be discharged, will complete his fast and also observe its qadha, even if semen is not discharged.
1604. If a fasting person indulges in courtship without the intention of allowing the semen to be discharged, and also, if he is sure that semen will not be discharged, his fast is in order, even if semen may be discharged unexpectedly. However, if he is not sure about the discharge and it takes place, then his fast is void.