ἐμφανία
From LSJ
οὐκ ἂν λάβοις παρὰ τοῦ μὴ ἔχοντος → you can't take from one who doesn't have, you can't squeeze blood out of a turnip, you can't get blood out of a turnip, you can't get blood from a stone, you can't get blood out of a stone
English (LSJ)
ἡ,
A information laid, IG9(1).267.10 (Opus).
Greek (Liddell-Scott)
ἐμφανία: ἡ, καταγγελία (;) Ἐπιγρ. Λοκρῶν Ὀπουντίων ἐν Ἀθην. τ. Α΄, σ. 489˙ πρβλ. Κουμανούδη Συναγ. Ἀθησ. λέξ. ἐν λ. καὶ ἴδε φάσις (Α).