πορφυροβαφής
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)
ές,
A = πορφυρόβαπτος, AB379, Poll.7.63, v.l. in Artem.2.3.
German (Pape)
[Seite 686] ές, = πορφυρόβαπτος, Pherecrat. in B. A. 379.
Greek (Liddell-Scott)
πορφῠροβᾰφής: -ές, = πορφυρόβαπτος, Α. Β. 379, Πολυδ. Ζ΄, 63.
