μιτρηφόρος
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 wearing a μίτρα, Hdt.7.62, Diog.Ath.1.1, Phoen.1.24, D.S.4.4.