2 Corinthians 9:6-7, 11
Whoever sows sparingly will also reap sparingly, and whoever sows generously will also reap generously. Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver. … You will be enriched in every way so that you can be generous on every occasion, and through us your generosity will result in thanksgiving to God.