Luke 1:57
Now Elisabeth's full time came that she should be delivered and she brought forth a son.
Genesis 21:2-3
For Sarah conceived and bore 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; he said and shall he not do it? He spoke and shall he not execute it?
Luke 1:13
But the angel said unto him, Fear not, Zacharias, for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
Luke 2:6-7
And so it was that while they were there, the days were accomplished that she should be delivered.