How is “run dry” used?

In His Girl Friday (1940), one line is: “...you never miss the water till the well runs dry.”

Which movie is “run dry” from?

The clip at the top of this page is from His Girl Friday (1940).

...you never miss the water till the well runs dry.

6 作品で登場 · 1 本目

to stop supplying water; to be all used so that none is left

6 本の映画に登場

to stop supplying water; to be all used so that none is left
The wells in most villages in the region have run dry.

定義：Oxford Advanced Learner's Dictionary 第 9 版