μυοφόνον
From LSJ
ὦ ἀδελφέ, τοῦτόν γε μήτε κακῶς ποιοίης μήτε τούτῳ τῷ τρόπῳ βλάπτοις κλέπτων τὰ χρήματα → Brother, you should neither do this man bad nor harm him in this way, i.e. by stealing his money/stuff
English (LSJ)
τό,
A wolf's bane, Aconitum Anthora, Thphr.HP6.1.4, 6.2.9; cf. μυηφόνον. μυοχάνη, v. μυριοχαύνη.