'Do Good' in the Bible

the one {feeding you} manna in the desert, [food] that your ancestors did not know, in order to humble you and in order to test you [so that he could] do good to you {in the future}.

This is what will happen: Just as the Lord delighted to do good for you and make you numerous, he will take delight in destroying and decimating you. You will be uprooted from the land you are about to possess.