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How was the covenant renewed through Isaac, Jacob, and Moses?

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Hebrew Bible Portion of the Aleppo Codex, a manuscript of the Hebrew Bible written in the Hebrew language in the 10th century ce; in the Shrine of the Book, Israel Museum, Jerusalem.

In the Hebrew Bible, the covenantal relationship established with Abraham is maintained and expanded through his descendants and the leadership of Moses.

Isaac and Jacob: God is frequently referred to as the God of Abraham, Isaac, and Jacob because the divine relationship of promise and purpose was fixed through these three patriarchs for all their descendants. Isaac was the fulfillment of the promise made to Abraham and Sarah. Jacob, the son of Isaac, continued this lineage as the traditional ancestor of the Twelve Tribes of Israel.123
Moses: The Sinai covenant represents a formal, conditional agreement between God and the Israelites. Acting as the mediator, Moses received the Ten Commandments and the Book of the Covenant at Mount Sinai. This event solidified the Israelites as God's "priestly kingdom and a holy nation" on the condition that they obey His laws.4