Genesis 21:1-7New International Version (NIV)
The Birth of Isaac
21 Now the Lord was gracious to Sarah as he had said, and the Lord did for Sarah what he had promised. 2 Sarah became pregnant and bore a son to Abraham in his old age, at the very time God had promised him. 3 Abraham gave the name Isaac[a] to the son Sarah bore him. 4 When his son Isaac was eight days old, Abraham circumcised him, as God commanded him. 5 Abraham was a hundred years old when his son Isaac was born to him.
6 Sarah said, “God has brought me laughter, and everyone who hears about this will laugh with me.” 7 And she added, “Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age.”

2 Chronicles 15:1-7New International Version (NIV)
Asa’s Reform
15 The Spirit of God came on Azariah son of Oded. 2 He went out to meet Asa and said to him, “Listen to me, Asa and all Judah and Benjamin. The Lord is with you when you are with him. If you seek him, he will be found by you, but if you forsake him, he will forsake you. 3 For a long time Israel was without the true God, without a priest to teach and without the law. 4 But in their distress they turned to the Lord, the God of Israel, and sought him, and he was found by them. 5 In those days it was not safe to travel about, for all the inhabitants of the lands were in great turmoil. 6 One nation was being crushed by another and one city by another, because God was troubling them with every kind of distress. 7 But as for you, be strong and do not give up, for your work will be rewarded.”