四分律比丘含注戒本 1.95

1.95

This refers to carrying out killing. Whether killing oneself, instructing another to kill, sending an emissary to kill, sending an emissary back and forth to kill, repeatedly sending an emissary to kill, sending an emissary successively through intermediaries to kill, seeking a man to kill, instructing someone to seek a man to kill, seeking a swordsman to kill, instructing someone to seek a swordsman to kill, manifesting physical gestures, speaking verbally, manifesting bodily and verbal gestures, instructing an emissary to praise [death], sending a letter, instructing someone to send a letter, digging a pitfall, setting a trap, giving poison, setting up killing implements, and other expedient means to kill—these are it.