Galatians 3:20

Now, a mediator for one is impossible; but God is one.

1 Timothy 2:5

For there is one God, and one mediator between God and men, the man Christ Jesus,

Hebrews 8:6

But now he has obtained a more excellent ministry, inasmuch as he is the mediator of a better covenant, which is established with reference to better promises.

Hebrews 9:15

And for this reason, he is the mediator of the new covenant: that, since his death has taken place for the redemption of transgressions that were under the former covenant, those who are called may receive the promise of the eternal inheritance.

Hebrews 12:24

and to Jesus the mediator of the new covenant, and to the blood of sprinkling that speaks better things than the blood of Abel.

Acts 12:20

And he was intending to make war upon the Tyrians and Sidonians; but they came with one consent to him; and having made Blastus, who had charge of the king's bed-chamber, their friend, they asked for peace, because their country was supported by that of the king.

Romans 3:29-30

Is he the God of the Jews only? Is he not also the God of the Gen tiles? Yes, of the Gentiles also:

Galatians 3:17

And this I affirm, that the covenant which had been before confirmed by God with respect to Christ, the law, which was four hundred and thirty years after, could not annul so as to make the promise of no effect.

Treasury of Scripture Knowledge

Summary

Now a mediator is not a mediator of one, but God is one.

A mediator is

General references

Bible References

A mediator is

Acts 12:20
And he was intending to make war upon the Tyrians and Sidonians; but they came with one consent to him; and having made Blastus, who had charge of the king's bed-chamber, their friend, they asked for peace, because their country was supported by that of the king.
1 Timothy 2:5
For there is one God, and one mediator between God and men, the man Christ Jesus,

But

Galatians 3:17
And this I affirm, that the covenant which had been before confirmed by God with respect to Christ, the law, which was four hundred and thirty years after, could not annul so as to make the promise of no effect.
Romans 3:29
Is he the God of the Jews only? Is he not also the God of the Gen tiles? Yes, of the Gentiles also:

General references

Romans 3:30
since there is one God, who will justify the circumcision by faith, and the uncircumcision through the faith.
James 2:19
You believe that there is one God; you do well: the demons also believe, and tremble.