NUM381 One who enters the Temple treasury to make a donation should wear neither: a folded garment, a shoe, a sandal, tefillin, or an amulet -- lest he grow up poor and people say: because of the sin of [stealing from] the treasury [and concealing the theft in the afore-mentioned articles], he has become impoverished; or, lest he grow rich and people say: from the proceeds of the treasury he has become wealthy. For one must be blameless in the sight of man as he must be in the sight of the Lord, as it is written: "and you shall be clean of the Lord and of Israel" (Shekalim 3:2)
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