God is the source of your supply; He is your provider, Jehovah Jireh! We are called to give God His portion first which is the tithe. This shows reverance; we need to give Him glory.

Deuteronomy 14:23 - ”Eat the tithe of your grain, new vine and oil, and the firstborn of your herds and flocks in the presence of the Lord your God at the place He will choose as a dwelling for His Name, so that you may learn to revere the Lord your God always."