In Genesis 17:1-8, God appears to a 99-year-old Abram, reaffirming His covenant by declaring Himself "God Almighty," demanding Abram walk blamelessly, and expanding His promises: Abram will become the "father of many nations," his name changed to Abraham, and his descendants will inherit the land of Canaan as an everlasting possession, establishing a permanent covenant where God promises to be their God, solidifying the promise of numerous descendants, kings, and land as an eternal bond.
The book of Genesis, meaning "beginning," lays the foundation for the entire Bible, starting with God's creation of the cosmos and humanity from chaos, establishing order, life, and the first human relationship in Eden.