Malachi 3:8-10

“Will a man rob God? Yet you are robbing me!” “How do we rob you?” you ask. “By not making the payments of the tenth and the contributions. You are suffering under a curse, yet you — the whole nation — are still robbing me. Bring the full tenth into the storehouse so that there may be food in my house. Test me in this way,” says the LORD of Armies. “See if I will not open the floodgates of heaven and pour out a blessing for you without measure.