«لَوْ كَانْ فِيهْ خِيرْ مَا رَمَاهِ الطِّيرْ»

The saying argues from behavior back to value: a scavenging bird, such as a crow, lets go of something only after nothing useful remains in it. Anything such a bird drops is therefore presumed empty, picked over, and worthless to whoever finds it.

Applied to people, it deflates a tightfisted person's apparent generosity. When someone who never parts with anything suddenly gives a thing away, the act itself exposes the gift: had it held any real worth, that person would have kept it.

Say it wryly when a known miser offers something with a show of generosity, implying the gift is a cast-off with no remaining value. It works as a pointed aside and can sting if aimed at the giver directly.