God made the same promises to Abraham, Isaac and Jacob,
Hebrews 11:9
By faith he dwelt in the land of promise as in a foreign country, dwelling in tents with Isaac and Jacob, the heirs with him of the same promise;
that their descendants are to inherit the land of Canaan forever.
Genesis 17:4-9
“As for Me, behold, My covenant is with you, and you shall be a father of many nations. No longer shall your name be called Abram, but your name shall be Abraham; for I have made you a father of many nations. I will make you exceedingly fruitful; and I will make nations of you, and kings shall come from you. And I will establish My covenant between Me and you and your descendants after you in their generations, for an everlasting covenant, to be God to you and your descendants after you. Also I give to you and your descendants after you the land in which you are a stranger, all the land of Canaan, as an everlasting possession; and I will be their God.”
And God said to Abraham: “As for you, you shall keep My covenant, you and your descendants after you throughout their generations.
God is so passionate about these promises, He named Himself after whom He gave these promises to.
Exodus 3:15-16
Moreover God said to Moses, “Thus you shall say to the children of Israel: ‘The Lord God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has sent me to you. This is My name forever, and this is My memorial to all generations.’ Go and gather the elders of Israel together, and say to them, ‘The Lord God of your fathers, the God of Abraham, of Isaac, and of Jacob, appeared to me, saying, “I have surely visited you and seen what is done to you in Egypt;
This signified the importance of the promises, His name and fame are dependant on keeping them. God had a dilemma as Israel had totally rejected Him and were removed from the promised land for their blatant disobedience. As a result the promises were not being fulfilled. Had God failed? Is He a liar? Or couldn’t He have finished what He started? For these very questions God sent His son Jesus to complete the work.
Luke 1:67-74
Now his father Zacharias was filled with the Holy Spirit, and prophesied, saying:
“Blessed is the Lord God of Israel,
For He has visited and redeemed His people,
And has raised up a horn of salvation for us
In the house of His servant David,
As He spoke by the mouth of His holy prophets,
Who have been since the world began,
That we should be saved from our enemies
And from the hand of all who hate us,
To perform the mercy promised to our fathers
And to remember His holy covenant,
The oath which He swore to our father Abraham:
To grant us that we,
Being delivered from the hand of our enemies,
Might serve Him without fear,