2 Corinthians 9:6-9 

6But this I say, He which soweth sparingly shall reap also sparingly; and he which soweth bountifully shall reap also bountifully. 7Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver. 8And God is able to make all grace abound toward you; that ye, always having all sufficiency in all things, may abound to every good work: