A righteous man understands giving

“A righteous man knows the rights of the poor; a wicked man does not understand such knowledge.” (Prov. 29:7 ESV) 

There will always be poor to help

“For there will never cease to be poor in the land. Therefore I command you, ‘You shall open wide your hand to your brother, to the needy and to the poor, in your land.’” (Deut. 15:12 ESV)

Giving also means to visit the afflicted 

“Religion that is pure and undefiled before God, the Father, is this: to visit orphans and widows in their affliction, and to keep oneself unstained from the world.” (James 1:27 ESV)

Whosoever sows bountifully

“The point is this: whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully.”

Quote 

“God judges what we give by what we keep.” — George Mueller