'Promise' in the Bible

I mean that the Covenant which God had already formally made is not abrogated by the Law which was given four hundred and thirty years later--so as to annul the promise.

For if the inheritance comes through obedience to Law, it no longer comes because of a promise. But, as a matter of fact, God has granted it to Abraham in fulfilment of a promise.

Why then was the Law given? It was imposed later on for the sake of defining sin, until the seed should come to whom God had made the promise; and its details were laid down by a mediator with the help of angels.

And if you belong to Christ, then you are indeed true descendants of Abraham, and are heirs in fulfilment of the promise.

But we see that the child of the slave-girl was born in the common course of nature; but the child of the free woman in fulfilment of the promise.

But you, brethren, like Isaac, are children born in fulfilment of a promise.