Abu Hurayrah (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said: "Charity does not diminish wealth, and Allah does not increase a servant, on account of his forgiveness, except in honor, and no one humbles himself seeking the pleasure of Allah except that Allah will elevate him."
The Prophet (may Allah's peace and blessings be upon him) points out that charity does not decrease wealth. Rather, it protects it from misfortunes and brings great compensation from Allah for its doner. So, it constitutes an increase, not a decrease. And Allah does not increase a person who forgives others, while he has the ability to take revenge or inflict punishment, except in power and honor. And that whoever humbles himself for the sake of Allah, not out of fear from anyone or a desire to flatter him or seek some benefit from him, Allah will reward him by elevation and honor.