ἀριστοπόνος
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)
ον,
A working excellently, χεῖρες Pi.O.7.51; μέλισσα Ps.-Phoc.171; ὑμέναιοι AP9.466: pl., ἀριστοπονῆες, as if from -πονεύς, Man.4.512. Adv.-νως App.Anth.3.182. II excellently wrought, μέλαθρον Nonn.D.44.79.