«اِللِّي مَا يِنْفَعْ لِلْجَنَّةْ يِنْفَعْ لِلنَّارْ»

The proverb expresses the idea that an object or resource need not be useless merely because it is unsuitable for one particular purpose. What fails to serve in one setting may be put to use in another.

Its contrast between Paradise and Hell presents two sharply different destinations to underline a broader principle: usefulness depends on where and how something is employed, rather than belonging to the thing in every circumstance.

Use it to observe that something unsuited to one task or setting can still be directed toward another use. The saying is especially apt when contrasting two possible places or purposes for the same thing.