John 17:3
And this is never ending life; that people may know you [as] the only true God, and Jesus Christ, the One whom you have sent.
Mark 12:29-32
And Jesus answered, "The foremost one is this [Deut. 6:4-5], 'Hear this, you Israelites, the Lord our God is the only Lord,
1 Timothy 2:5
For there is one God and one Mediator between God and mankind --- the man Christ Jesus,
John 10:30
I and the Father are one."
1 Corinthians 8:4-6
Now concerning [the matter of] eating foods [once] offered as sacrifices to idols, we know that an idol is [really] nothing in the world [at all], and that there is only one God.