तं सत्त्री महामात्रवधे योजयेत् ॥ कZ_०५.१.१७ ॥
taṃ sattrī mahāmātravadhe yojayet.
A chamberlain/attendant (sattrī) should engage him in the killing of the high minister(s).
Because palace attendants have routine access and can arrange proximity, timing, and logistics while insulating the king from direct implication.