'Mediator' in the Bible

Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.

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

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

But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.

And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.

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