'Covenant' in the Bible

You are the sons of the prophets and of the covenant that God made with your ancestors, saying to Abraham, And all the families of the earth will be blessed through your offspring.

Then He gave him the covenant of circumcision. After this, he fathered Isaac and circumcised him on the eighth day; Isaac did the same with Jacob, and Jacob with the 12 patriarchs.

Since He raised Him from the dead, never to return to decay, He has spoken in this way, I will grant you the faithful covenant blessings made to David.