​The Birth of Abraham and Sarah's Son

Genesis 21:1-8

1  And the LORD visited Sarah as he had said, and the LORD did unto Sarah as he had spoken. 
2  For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him. 
3  And Abraham called the name of his son that was born unto him, whom Sarah bare to him, Isaac. 
4  And Abraham circumcised his son Isaac being eight days old, as God had commanded him. 
5  And Abraham was an hundred years old, when his son Isaac was born unto him. 
6  And Sarah said, God hath made me to laugh, so that all that hear will laugh with me. 
7  And she said, Who would have said unto Abraham, that Sarah should have given children suck? for I have born him a son in his old age. 
God Protects Hagar and Ishmael
8  And the child grew, and was weaned: and Abraham made a great feast the same day that Isaac was weaned.