ματροπόλος
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
French (Bailly abrégé)
dor. c. μητροπόλος.
English (Slater)
μᾱτροπόλος, -ον
1 attending to mothers ματροπόλῳ σὺν Ἐλειθυίᾳ (καταχρηστικῶς Schr., Pyth. Comm.) (P. 3.9)