God is generous and so He calls us to be as well. What we do with what God has given us shows the world where our hearts are and enables us to support and proclaim the gospel. We want to glorify God in every area of our lives, and that especially includes what we do with our finances.
The generous man [is a source of blessing and] shall be prosperous and enriched, and he who waters will himself be watered [reaping the generosity he has sown].
Proverbs 11:25 AMP