Genesis 21:2 Meaning: The Set Time of God's Promise
Sarah conceived, and bore Abraham a son in his old age, at the set time of which God had spoken to him.
For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.
And Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.
and Sarah conceiveth, and beareth a son to Abraham, to his old age, at the appointed time that God hath spoken of with him;
And Sarah conceived, and bore Abraham a son in his old age, at the appointed time of which God had spoken to him.
Meaning in one sentence
Genesis 21:2 shows God’s faithfulness as Sarah conceives Isaac at the exact time He promised, demonstrating His power and control over history.
Context
Genesis 21 opens after years of waiting. Abraham was one hundred years old. Sarah was ninety and had been barren her whole life. God had promised them a son many years before, and that promise had been repeated with increasingly specific details. Now, at last, Moses records the fulfillment. The entire chapter centers on Isaac’s birth, but this verse is the hinge: everything before looks forward; everything after celebrates what God has done. It is a quiet verse for such a loud miracle. No fanfare. Just the steady, faithful arrival of what God had spoken.
Key Words
Three Hebrew words anchor this verse. First, mo‛ed ("set time") is not a casual calendar mark. It is the same word used for sacred festivals and the tent of meeting, a time God chooses and appoints. Second, zaqun ("old age") means the worn-out, extreme end of life, not just advanced years. It points to the impossibility of the situation. Third, dibber ("spoken") is the verb used for God’s promise, a spoken word that carries the power to make itself come true. Together, these words remind us: God’s timing is not random, and His word is not empty. When He speaks a promise, He also arranges the exact moment for its fulfillment.
How Christians Read This Verse
Christians across traditions have praised this verse as a testimony to God’s faithfulness. Reformed commentators like Calvin note how Abraham’s old age highlights the miracle and draws attention to God’s truth. Anglican scholars (Cambridge Bible) connect it to Hebrews 11:11, where Sarah’s faith is commended. Baptist expositor Gill emphasizes the precise timing as proof that God not only keeps promises but keeps them on schedule. Protestant commentators Keil and Delitzsch call Isaac the fruit of "omnipotent grace working against and above nature." All these voices agree: the verse celebrates God’s sovereign power and unshakable faithfulness.
A common misunderstanding
Living This Out
This week, you may be waiting on something that feels long past its due date, a relationship restored, a breakthrough, an answer to a prayer you have prayed for years. Let this verse remind you that God keeps time differently. He does not forget His promises. The same God who marked the exact day for Isaac’s birth has a set time for what He has said to you. You do not have to manufacture faith; you only need to hold on, one day at a time, trusting that the appointed hour will come.
Main takeaway: God speaks what He will do, and He brings it to pass at the exact time He has chosen.
For Families
For ages 5, 8
God promised Abraham and Sarah a baby. They waited a very long time. But God kept His promise, and baby Isaac was born at just the right time.
For ages 9, 12
Abraham and Sarah were very old when Isaac was born, far past the age of having children. Yet God had promised them a son, and He brought it to pass exactly when He said He would. This story shows that God always keeps His promises, even when things seem impossible. When you are waiting for something, remember that God’s timing is perfect. He knows the best moment to act.
Questions People Ask
Why does Genesis 21:2 mention Abraham's old age specifically?
The Hebrew word used here, zaqun, means extreme old age, the worn-out end of life. By noting this, the writer emphasizes the miracle: Abraham and Sarah were both beyond natural childbearing, so Isaac’s birth could only be God’s doing.
What does 'set time' mean in the original language?
The phrase 'set time' translates the Hebrew word mo‛ed, which refers to an appointed time or sacred meeting. It is the same word used for God’s appointed festivals and the tent of meeting. This shows that God had a precise, intentional schedule for fulfilling His promise.
How does this verse connect to the birth of Jesus?
Many Christian interpreters see Isaac’s birth as a type or foreshadowing of Christ’s birth. Both were miraculous, both were the fulfillment of a long-awaited promise, and both came at God’s appointed time. Matthew Henry calls Isaac 'a type of Christ, that seed which the holy God had so long promised.'
Was Sarah's conception a natural event or a miracle?
The Bible presents it as a miracle. Sarah had been barren her whole life, and both she and Abraham were far past childbearing age. The author of Hebrews (11:11) says it was by faith that Sarah received power to conceive, and commentators agree that God supernaturally enabled her.
Why is it important that Isaac was born at 'the set time'?
The emphasis on the 'set time' highlights God’s sovereignty and faithfulness. It shows that God’s promises are not vague, He specifies when they will happen, and He always follows through. This gives believers confidence that God will keep every promise He has made, even when circumstances seem impossible.
For pastors & researchers
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