Scriptures lay down varying proportion of one's income (ranging from 10% to 40%) to give away in daan.
Bhagwat puran(भागवत पुराण) - At one stage, when "Sukhracharya" advices king "Bali" against giving all his wealth away. He quotes learned people to recommend dividing one's fund into five equal parts.
"There's never been a true war that wasn't fought between two sets of people who were certain they were in the right. The really dangerous people believe they are doing whatever they are doing solely and only because it is without question the right thing to do. And that is what makes them dangerous." ― Neil Gaiman, American Gods
The righteous do not always do right, but their souls remain pure." ― J.R. Ward, Lover Enshrined