τέτορες
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)
οἱ, αἱ, τέτορα, τά, Dor. for τέσσαρες (q.v.).
German (Pape)
[Seite 1096] οἱ, αἱ, τέτορα, τά, dor. statt. τέσσαρες, Hes. O. 700; Epigr. bei Her. 7, 228.