Genesis 17:21 (KJV)

What does Genesis 17:21 mean?

Genesis 17:21 means that God is promising Abraham that He will make His special agreement—a covenant—with Isaac, the son whom Sarah will give birth to at a specific time the following year. God is making it clear that Isaac, not any other son, will be the child through whom this covenant continues.

In this verse, God is speaking directly to Abraham, clarifying that His covenant will be established with Isaac, who has not yet been born. The situation follows Abraham’s earlier concerns about Ishmael, his son by Hagar, but God insists that the promise will go through Sarah’s son, Isaac, at a set time in the next year.

The Hebrew behind Genesis 17:21

• "Covenant" (בְּרִית, berit): This word means a binding agreement or promise, often used for God's special relationship with His people. Here, it highlights that God's formal commitment is specifically with Isaac.
• "Establish" (קוּם, qum): This verb means to make something stand or to confirm it. God is not just making a promise, but actively setting it up and ensuring it will happen with Isaac.
• "Time" (מוֹעֵד, mo'ed): This word often refers to an appointed or set time, sometimes even a festival or meeting. It emphasizes that God has a precise plan and timeline for Isaac’s birth, not a vague or open-ended promise.

Why Genesis 17:21 matters

• Genesis 17:21 clears up any confusion about which of Abraham’s descendants would inherit God’s covenant, showing that it is not through Ishmael but through Isaac, the son promised to Sarah.
• The verse highlights God’s control over the timing and fulfillment of His promises, underlining that the birth of Isaac will happen exactly when God says.
• This statement connects to the larger story of God’s faithfulness and the unfolding of His plan for Abraham’s family, setting the stage for the rest of Genesis and the story of Israel.