Luke 1:57

Now Elisabeth's time was fulfilled that she should be delivered; and she brought forth a son.

Genesis 21:2-3

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

Numbers 23:19

God is not a man, that he should lie, Neither the son of man, that he should repent: Hath he said, and will he not do it? Or hath he spoken, and will he not make it good?

Luke 1:13

But the angel said unto him, Fear not, Zacharias: because thy supplication is heard, and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.

Luke 2:6-7

And it came to pass, while they were there, the days were fulfilled that she should be delivered.

Treasury of Scripture Knowledge

Summary

Now Elisabeth's full time came that she should be delivered; and she brought forth a son.

Bible References

General references

Luke 1:13
But the angel said unto him, Fear not, Zacharias: because thy supplication is heard, and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
Luke 2:6
And it came to pass, while they were there, the days were fulfilled that she should be delivered.
Genesis 21:2
And Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.
Numbers 23:19
God is not a man, that he should lie, Neither the son of man, that he should repent: Hath he said, and will he not do it? Or hath he spoken, and will he not make it good?

American Standard Version Public Domain