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
dē-glā̆bro: no
I perf., ātum, 1, v. a., to smooth off, make smooth: arbores, Dig. 47, 7, 5: corpus, Lact. 1, 21.