Galatians 3:20

Now the mediator or go-between [in a transaction] is not [needed] for just one party; whereas God is only one [and was the only One giving the promise to Abraham, but the Law was a contract between two, God and Israel; its validity depended on both].

1 Timothy 2:5

For there is [only] one God, and [only] one Mediator between God and mankind, the Man Christ Jesus,

Deuteronomy 6:4

“Hear, O Israel! The Lord is our God, the Lord is one [the only God]!

Hebrews 8:6

But as it is, Christ has acquired a [priestly] ministry which is more excellent [than the old Levitical priestly ministry], for He is the Mediator (Arbiter) of a better covenant [uniting God and man], which has been enacted and rests on better promises.

Hebrews 9:15

For this reason He is the Mediator and Negotiator of a new covenant [that is, an entirely new agreement uniting God and man], so that those who have been called [by God] may receive [the fulfillment of] the promised eternal inheritance, since a death has taken place [as the payment] which redeems them from the sins committed under the obsolete first covenant.

Hebrews 12:24

and to Jesus, the Mediator of a new covenant [uniting God and man], and to the sprinkled blood, which speaks [of mercy], a better and nobler and more gracious message than the blood of Abel [which cried out for vengeance].

Genesis 15:18

On the same day the Lord made a covenant (promise, pledge) with Abram, saying,

“To your descendants I have given this land,
From the river of Egypt to the great river Euphrates—

Genesis 17:1-2

When Abram was ninety-nine years old, the Lord appeared to him and said,

“I am God Almighty;
Walk [habitually] before Me [with integrity, knowing that you are always in My presence], and be blameless and complete [in obedience to Me].

Job 9:33


“There is no arbitrator between us,
Who could lay his hand upon us both [would that there were].

Acts 12:20

Now Herod [Agrippa I] was extremely angry with the people of Tyre and Sidon; and their delegates came to him in a united group, and after persuading Blastus, the king’s chamberlain [to support their cause], they asked for peace, because their country was fed by [imports of grain and other goods from] the king’s country.

Romans 3:29-30

Or is God the God of Jews only? Is He not also the God of Gentiles [who were not given the Law]? Yes, of Gentiles also,

Galatians 3:17

This is what I mean: the Law, which came into existence four hundred and thirty years later [after the covenant concerning the coming Messiah], does not and cannot invalidate the covenant previously established by God, so as to abolish the promise.

Treasury of Scripture Knowledge

Summary

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

Bible References

A mediator is

Job 9:33

“There is no arbitrator between us,
Who could lay his hand upon us both [would that there were].
Acts 12:20
Now Herod [Agrippa I] was extremely angry with the people of Tyre and Sidon; and their delegates came to him in a united group, and after persuading Blastus, the king’s chamberlain [to support their cause], they asked for peace, because their country was fed by [imports of grain and other goods from] the king’s country.
1 Timothy 2:5
For there is [only] one God, and [only] one Mediator between God and mankind, the Man Christ Jesus,

But

Galatians 3:17
This is what I mean: the Law, which came into existence four hundred and thirty years later [after the covenant concerning the coming Messiah], does not and cannot invalidate the covenant previously established by God, so as to abolish the promise.
Genesis 15:18
On the same day the Lord made a covenant (promise, pledge) with Abram, saying,

“To your descendants I have given this land,
From the river of Egypt to the great river Euphrates—
Genesis 17:1
When Abram was ninety-nine years old, the Lord appeared to him and said,

“I am God Almighty;
Walk [habitually] before Me [with integrity, knowing that you are always in My presence], and be blameless and complete [in obedience to Me].
Deuteronomy 6:4
“Hear, O Israel! The Lord is our God, the Lord is one [the only God]!
Romans 3:29
Or is God the God of Jews only? Is He not also the God of Gentiles [who were not given the Law]? Yes, of Gentiles also,

General references

Deuteronomy 5:3
The Lord did not make this covenant with our fathers, but with us, all of us who are alive here today.
Romans 3:30
since indeed it is one [and the same] God who will justify the circumcised by faith [which began with Abraham] and the uncircumcised through [their newly acquired] faith.
James 2:19
You believe that God is one; you do well [to believe that]. The demons also believe [that], and shudder and bristle [in awe-filled terror—they have seen His wrath]!