Malachi 3:7-8

7Ever since the time of your ancestors you have turned away from my decrees and have not kept them. Return to me, and I will return to you,” says the LORD Almighty. “But you ask, ‘How are we to return?’

8“Will a mere mortal rob God? Yet you rob me. “But you ask, ‘How are we robbing you?’ “In tithes and offerings.