John 17:3
But this is eternal life, that they know thee the only true God, and Jesus Christ whom thou didst send.
Mark 12:29-32
And Jesus responded to him, The first commandment of all; Hear, O Israel; The Lord our God, is one Lord:
1 Timothy 2:5
For there is one God, and there is also one mediator of 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 things offered to idols, we know that an idol is nothing in the world, and that there is no God except one.
Treasury of Scripture Knowledge
Bible References
General references
James 2:19
Do you believe that there is one God? you do well: the demons also believe and tremble.