四分律比丘含注戒本 1.130

1.130

If he applies means to manipulate but does not emit, it is a sthūlātyaya. If bhikṣus instruct one another, if emission occurs, they commit a sthūlātyaya; if it does not emit, a duṣkṛta. For a nun, it is a prāyaścittika. For the lower three assemblies, a duṣkṛta. Cases of non-offense: all instances where one does not give rise to the intention to emit semen.