It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) as a marfu' report (from the Prophet): "Charity never decreases wealth. No servant extends his hand with charity except that it is placed in the Hand of Allah before it reaches the hand of the one who asks. And no servant opens a door of begging without need except that Allah opens upon him a door of poverty."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12098