רְבָבָה

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

Source

English (Strong)

from רָבַב; abundance (in number), i.e. (specifically) a myriad (whether definite or indefinite): many, million, X multiply, ten thousand.