Genesis 21:2

So Sarah conceived and bore a son to Abraham in his old age, at the appointed time of which God had spoken to him.

Galatians 4:22

For it is written that Abraham had two sons, one by the bondwoman and one by the free woman.

Hebrews 11:11

By faith even Sarah herself received ability to conceive, even beyond the proper time of life, since she considered Him faithful who had promised.

Genesis 17:21

But My covenant I will establish with Isaac, whom Sarah will bear to you at this season next year.”

Genesis 17:19

But God said, “No, but Sarah your wife will bear you a son, and you shall call his name Isaac; and I will establish My covenant with him for an everlasting covenant for his descendants after him.

Genesis 18:10

He said, “I will surely return to you at this time next year; and behold, Sarah your wife will have a son.” And Sarah was listening at the tent door, which was behind him.

Genesis 18:14

Is anything too difficult for the Lord? At the appointed time I will return to you, at this time next year, and Sarah will have a son.”

Acts 7:8

And He gave him the covenant of circumcision; and so Abraham became the father of Isaac, and circumcised him on the eighth day; and Isaac became the father of Jacob, and Jacob of the twelve patriarchs.

2 Kings 4:16-17

Then he said, “At this season next year you will embrace a son.” And she said, “No, my lord, O man of God, do not lie to your maidservant.”

Luke 1:24-25

After these days Elizabeth his wife became pregnant, and she kept herself in seclusion for five months, saying,

Luke 1:36

And behold, even your relative Elizabeth has also conceived a son in her old age; and she who was called barren is now in her sixth month.

Romans 9:9

For this is the word of promise: “At this time I will come, and Sarah shall have a son.”

Treasury of Scripture Knowledge

Summary

For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.

General references

Bible References

Conceived

2 Kings 4:16
Then he said, “At this season next year you will embrace a son.” And she said, “No, my lord, O man of God, do not lie to your maidservant.”
Luke 1:24
After these days Elizabeth his wife became pregnant, and she kept herself in seclusion for five months, saying,
Acts 7:8
And He gave him the covenant of circumcision; and so Abraham became the father of Isaac, and circumcised him on the eighth day; and Isaac became the father of Jacob, and Jacob of the twelve patriarchs.
Galatians 4:22
For it is written that Abraham had two sons, one by the bondwoman and one by the free woman.
Hebrews 11:11
By faith even Sarah herself received ability to conceive, even beyond the proper time of life, since she considered Him faithful who had promised.

At the set

Genesis 17:19
But God said, “No, but Sarah your wife will bear you a son, and you shall call his name Isaac; and I will establish My covenant with him for an everlasting covenant for his descendants after him.
Genesis 18:10
He said, “I will surely return to you at this time next year; and behold, Sarah your wife will have a son.” And Sarah was listening at the tent door, which was behind him.
Romans 9:9
For this is the word of promise: “At this time I will come, and Sarah shall have a son.”

General references

Luke 1:57
Now the time had come for Elizabeth to give birth, and she gave birth to a son.
Hebrews 6:15
And so, having patiently waited, he obtained the promise.