Genesis 21:2

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

Galatians 4:22

For it is written that Abraham had two sons, the one by a bondmaid, the other by a freewoman.

Hebrews 11:11

By faith also Sara herself being sterile received strength to conceive seed and was delivered of a child when she was past age, because she believed him to be faithful who had promised.

Genesis 17:21

But I will establish my covenant with Isaac, whom Sarah shall bear unto thee at this set time in the next year.

Genesis 17:19

And God said, Sarah thy wife shall bear thee a son indeed, and thou shalt call his name Isaac (laughter); and I will confirm my covenant with him for an everlasting covenant and with his seed after him.

Genesis 18:10

Then he said, I will certainly return unto thee according to the time of life; and, behold, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.

Genesis 18:14

Is any thing too hard for the LORD? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son.

Acts 7:8

And he gave him the covenant of circumcision; and so Abraham begat Isaac and circumcised him the eighth day, and Isaac begat Jacob, and Jacob begat the twelve patriarchs.

2 Kings 4:16-17

And he said, At the appointed time, according to the time of life, thou shalt embrace a son. And she said, No, my lord, thou man of God, do not deceive thy handmaid.

Luke 1:24-25

And after those days his wife Elisabeth conceived and hid herself five months, saying,

Luke 1:36

And, behold, thy relative Elisabeth, she has also conceived a son in her old age; and this is the sixth month with her, who was called barren.

Romans 9:9

For the word of the promise is this, At this time I will come, and Sara 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
And he said, At the appointed time, according to the time of life, thou shalt embrace a son. And she said, No, my lord, thou man of God, do not deceive thy handmaid.
Luke 1:24
And after those days his wife Elisabeth conceived and hid herself five months, saying,
Acts 7:8
And he gave him the covenant of circumcision; and so Abraham begat Isaac and circumcised him the eighth day, and Isaac begat Jacob, and Jacob begat the twelve patriarchs.
Galatians 4:22
For it is written that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
Hebrews 11:11
By faith also Sara herself being sterile received strength to conceive seed and was delivered of a child when she was past age, because she believed him to be faithful who had promised.

At the set

Genesis 17:19
And God said, Sarah thy wife shall bear thee a son indeed, and thou shalt call his name Isaac (laughter); and I will confirm my covenant with him for an everlasting covenant and with his seed after him.
Genesis 18:10
Then he said, I will certainly return unto thee according to the time of life; and, behold, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.
Romans 9:9
For the word of the promise is this, At this time I will come, and Sara shall have a son.

General references

Luke 1:57
Now Elisabeth's full time came that she should be delivered and she brought forth a son.
Hebrews 6:15
And so, after he had patiently endured, he obtained the promise.