Cross reference
Luke 1:57
57 Now the time that Elizabeth should give birth was fulfilled, and she brought forth a son.
Genesis 21:2-3
2 Sarah conceived, and bore Abraham a son in his old age, at the set time of which God had spoken to him.
3 Abraham called his son who was born to him, whom Sarah bare to him, Isaac.{Isaac means "He laughs."}
Numbers 23:19
19 God is not a man, that he should lie, Neither the son of man, that he should repent: Has he said, and will he not do it? Or has he spoken, and will he not make it good?
Luke 1:13
13 But the angel said to him, "Don't be afraid, Zacharias, because your request has been heard, and your wife, Elizabeth, will bear you a son, and you shall call his name John.
Luke 2:6-7
6 It happened, while they were there, that the day had come that she should give birth.
7 She brought forth her firstborn son, and she wrapped him in bands of cloth, and laid him in a feeding trough, because there was no room for them in the inn.