To Gain and to Give: Hilchot Tzedakah, Day 32

One never suffers a loss or is adversely affected by giving tzedakah, as it is written והיה מעשה הצדקה שלום (ישעיה ל"ב י"ז) and the act of giving tzedakah brought peace.

שו"ע ס' רמז ס"ב