κακῶς ποιεῖν
From LSJ
ὦ πολλῶν ἤδη λοπάδων τοὺς ἄμβωνας περιλείξας → you who have licked the labia of many vaginas (Eupolis fr. 52)
Greek > English (Woodhouse)
harm, injure, do a bad turn, do in injury, do one a bad turn, evilly entreat, treat ill, use ill