This is the account: The Hebrew word is toledoth (a term that introduces a new section or family history; see study note on 2:4). This section tells about Terah’s family.
The details in 11:28–25:11 are about the family line that comes from Terah. The focus is on Abraham and God’s covenant with him.
The passage also highlights Isaac, the promised child. Isaac continued the family line and carried God’s blessing to the next generation.