you can't get blood out of a stone
The phrase "you can't get blood out of a stone" is an idiomatic expression that means it is impossible to extract something from a source that does not possess or provide it. It signifies the futility of attempting to obtain or achieve something that is not inherently present or available. Just as squeezing a stone wouldn't yield any blood, the expression suggests that some outcomes or results are beyond the realm of possibility or feasibility.
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