[361] Now at that time, as a certain bhikkhu was squeezing his genital member with his fist, semen (asuci) was emitted. He became remorseful … "Bhikkhu, there is no offence for one who has no intention of emission." Now at that time, as a certain bhikkhu who intended emission was squeezing his genital member with his fist, semen was emitted … semen was not emitted. He became remorseful … "Bhikkhu, there is no offence entailing a formal meeting of the Saṅgha (saṅghādisesa); there is an offence of grave transgression (thullaccaya)."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.