In Judaism, the covenant God made with humanity, specifically the covenant of Abraham, is understood to be filled and continued through the
Jewish people. They are seen as the descendants of Abraham and therefore the inheritors of the covenant. This covenant includes obligations on both God and the Jewish people. God promises blessings and protection, while the Jewish people are obligated to follow God's laws and commandments.
In Christianity, Jesus Christ is seen as fulfilling the covenant God made with humanity. Christians believe that Jesus, through his death and resurrection, established a "new covenant" that is open to all who believe in him, regardless of their ethnic background. They see this new covenant as superseding the old covenant with the Jewish people, though many denominations acknowledge the continued relevance and significance of the Abrahamic covenant.
So, the answer depends on the religious perspective:
* Judaism: The Jewish people.
* Christianity: Jesus Christ.