Mar Ukba was a wealthy Babylonian Jew known for his discreet tzedakah. He used to leave coins under a neighbor's doorsill each night, never waiting to be seen. One day he learned that the poor man he had been supporting was not always poor. The recipient had once been an aristocrat, accustomed to wine with every meal and fine linen on every bed.
From that moment Mar Ukba doubled his gift. The man was not starving, but he was suffering a specific and invisible kind of deprivation — the shock of having lost a life of comfort. To give him the minimum that would keep him alive was a technical fulfillment of charity; to give him enough to taste what he had lost, without flaunting the loss, was charity at its full stature.
Mar Ukba understood what the Talmud later formulated in law: tzedakah is measured not by the giver's generosity but by the recipient's prior standard of living. A pauper born to poverty needs bread; an aristocrat fallen on hard times needs bread and also something like dignity.
Before his death, Mar Ukba distributed half his entire wealth. He did not wait for his children to administer his estate. He wanted to know, before he died, that the coins he had earned had passed into the hands that needed them. Gaster's Exempla of the Rabbis (1924, No. 229) preserves both gestures — the doubled nightly gift and the final half-estate — as lessons in how to calibrate generosity to the actual shape of another human being's life.