2 Corinthians 9:  But this I say: He who sows sparingly will also reap sparingly, and he who sows bountifully will also reap bountifully. So let each one give as he purposes in his heart, not grudgingly or of necessity; for God loves a cheerful giver.  And God is able to make all grace abound toward you, that you, always having all sufficiency in all things, may have an abundance for every good work. As it is written: “He has dispersed abroad, He has given to the poor; His righteousness endures forever.” Now may He who supplies seed to the sower, and bread for food, supply and multiply the seed you have sown and increase the fruits of your righteousness, while you are enriched in everything for all liberality, which causes thanksgiving through us to God.

“Therefore, let us use our goods sparingly, as belonging to others, so that they may become our own. How shall we use them sparingly, as belonging to others? When we do not spend them beyond our needs, and do not spend for our needs only, but give equal shares into the hands of the poor. If you are affluent, but spend less than what you need, you will give an account of the funds which were entrusted to you”
(St John Chrysostom)