Charity does not decrease wealth according to a saying of the Prophet Muhammad. Forgiving others increases respect, and being humble causes Allah to elevate one's status among people.
Abu Hurairareported Allah’s Messenger (may peace be upon
him) as saying: Charity does not in any way decrease the
wealth and the servant who forgives Allah adds to his
respect, and the one who shows humility Allah elevates him
in the estimation (of the people).
(Sahih Muslim Book 032, Number 6264)