John 17:3
And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent.
Mark 12:29-32
Jesus answered, "The first is: 'Hear, O Israel, the Lord our God is one Lord.
1 Timothy 2:5
For there is one God, and one mediator also between God and men, the man Christ Jesus,
John 10:30
I and the Father are one."
1 Corinthians 8:4-6
Therefore concerning the eating of food sacrificed to idols, we know that an idol is nothing in the world, and that there is no God but one.
Treasury of Scripture Knowledge
Bible References
General references
James 2:19
You believe that God is one; you do well. Even the demons believeand shudder.