Malachi 3:7-8

7I have told you my commands. But you do not listen to me any longer. You have not obeyed me, even since the time of your ancestors. Now, return to me! Then I will return to bless you.’ That is what the Lord Almighty says. ‘But you ask, “How do we return to you?”

8I say to you, “A man should not rob God. But you are robbing me.” But you ask, “How do we rob you?” I say, “You do not give to me the tithes and the offerings that you should give.”