observans
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
Latin > English (Lewis & Short)
observans: antis, Part. and P. a., from observo.
Latin > French (Gaffiot 2016)
observāns,¹⁴ tis, part.-adj. de observo, qui a de la déférence, de la considération, du respect pour : [avec gén.] Cic. Quinct. 39 ; observantissimus mei homo Cic. Q. 1, 2, 11, personne pleine d’égards pour moi, cf. Cic. Fam. 13, 3, 1
