ἁλυκόσμυρνα
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)
ἡ, a kind of
A myrrh, Hippiatr.52.
Greek (Liddell-Scott)
ἁλυκόσμυρνα: ἡ, εἶδος σμύρνης, Ἱππιατρ.