For three sins or four

Amos
I read somewhere about this passage in Amos.  Amos is listing off a number of foreign places, describing God's judgment that will be meted out upon them.  Each new place gets a little closer to home, however, and Amos' audience must have been getting a little more anxious as they heard about Damascus, then Gaza, Tyre, Edom, Ammon, Moab, and then, what?  Judah and Israel?  Yes, God was going to judge them for their sins as well.  Don't take God's grace for granted or as a free ticket to sin with impunity.