From the Trivia Files Contest: Another Challenge

This is the fourth question of the challenge.  If you're just catching up with me, don't forget to click on the tags at the end of this post so you can go back and read the rules and answer all the questions so far.

The prize for this contest is a book by Fritz Ridenour called So What's the Difference?  This resource lays out the basic tenets of the world's major religions and compares them to the central doctrines of Christianity.  I first read this book in high school, and it really helped me (as I've already stated, I'm not benefiting in any way from that endorsement).  This book is not overly technical and I think that's one of the best things about it--it makes complicated concepts plain to readers without forcing them to get a college degree in order to understand it.

Now, on to the question:

Which of these is not one of the Ten Commandments?  They are not listed in order.

1. You shall not steal.
2. You shall not murder.
3. You shall not misuse God's name.
4. You shall not have any other gods before me.
5. You shall not commit adultery.
6. Love your neighbor as yourself.
7. Honor your father and mother.
8. Remember the Sabbath day and keep it holy.
9. You shall not covet.
10. You shall not give false testimony against your neighbor.