"You must set aside a tithe of your crops—one-tenth of all the crops you harvest each year. Bring this tithe to the designated place of worship—the place the lord your God chooses for his name to be honored—and eat it there in his presence. This applies to your tithes of grain, new wine, olive oil, and the firstborn males of your flocks and herds. Doing this will teach you always to fear the lord your God."
Emphasis (obviously) mine.
But really... tithing will teach you to always to fear the Lord your God?
What's in a tithe? A lot apparently.
How's your giving?