Malachi 3:7-8 MSG

7 You have a long history of ignoring my commands. You haven't done a thing I've told you. Return to me so I can return to you," says God-of-the-Angel-Armies. "You ask, 'But how do we return?'
8 "Begin by being honest. Do honest people rob God? But you rob me day after day. "You ask, 'How have we robbed you?' "The tithe and the offering - that's how!'