Psalm 105:10

And he gave it to Jacob for a law, and to Israel for an eternal agreement;

Genesis 17:7-8

And I will make between me and you and your seed after you through all generations, an eternal agreement to be a God to you and to your seed after you.

Genesis 28:13-15

And he saw the Lord by his side, saying, I am the Lord, the God of Abraham your father, and the God of Isaac: I will give to you and to your seed this land on which you are sleeping.

2 Samuel 23:5

For is not my house so with God? For he has made with me an eternal agreement, ordered in all things and certain: as for all my salvation and all my desire, will he not give it increase?

Hebrews 13:20

Now may the God of peace, who made that great keeper of his flock, even our Lord Jesus, come back from the dead through the blood of the eternal agreement,

Treasury of Scripture Knowledge

Summary

And confirmed the same unto Jacob for a law, and to Israel for an everlasting covenant:

Bible References

An everlasting

Genesis 17:7
And I will make between me and you and your seed after you through all generations, an eternal agreement to be a God to you and to your seed after you.
2 Samuel 23:5
For is not my house so with God? For he has made with me an eternal agreement, ordered in all things and certain: as for all my salvation and all my desire, will he not give it increase?
Hebrews 13:20
Now may the God of peace, who made that great keeper of his flock, even our Lord Jesus, come back from the dead through the blood of the eternal agreement,

General references

Genesis 13:15
For all the land which you see I will give to you and to your seed for ever.
Deuteronomy 5:3
The Lord did not make this agreement with our fathers but with us, who are all living and present here today.
Micah 7:20
You will make clear your good faith to Jacob and your mercy to Abraham, as you gave your oath to our fathers from times long past.
Luke 1:55
As he gave his word to our fathers.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain