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
coccĭnus,¹⁵ a, um (coccum), d’écarlate : Juv. 3, 283 || coccĭna, ōrum, n., vêtements d’écarlate : Mart. 2, 39, 1 || coccĭnum, ī, n., Hier. Is. 1, 1, 18, c. coccum.