16 But some one will say that public support is only refused to the cost of foreign religions. Far be it from good princes to suppose that what has been given to certain persons from the common property can be in the power of the treasury. For as the State consists of individuals, that which goes out from it becomes again the property of individuals. You rule over all; but you preserve his own for each individual; and justice has more weight with you than arbitrary will. Take counsel with your own liberality whether that which you have conferred on others ought to be considered public property. Sums once given to the honour of the city cease to be the property of those who have given them, and that which at the commencement was a gift, by custom and time becomes a debt. Any one is therefore endeavouring to impress upon your minds a vain fear, who asserts that you share the responsibility of the givers unless you incur the odium of withdrawing the gifts.
Source: Memorial of Symmachus (New Advent)