1 Corinthians 8:4
New American Standard Bible (NASB)
4 Therefore concerning the eating of things sacrificed to idols, we know that there is no such thing as an idol in the world, and that there is no God but one.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=1 Corinthians 8:4&version=NASB