Old Testament

The Book of Genesis: Chapter 21:1-8-14

And the Lord visited Sarah as He had said, and the Lord did for Sarah as He had spoken. For Sarah conceived and bore Abraham a son in his old age, at the set time of which God had spoken to him. And Abraham called the name of his son who was born to him--whom Sarah bore to him--Isaac. Then Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. Now Abraham was one hundred years old when his son Isaac was born to him. And Sarah said, "God has made me laugh, and all who hear will laugh with me." She also said, "Who would have said to Abraham that Sarah would nurse children? For I have borne him a son in his old age."
So the child grew and was weaned. And Abraham made a great feast on the same day that Isaac was weaned. And Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, scoffing. Therefore she said to Abraham, "Cast out this bondwoman and her son; for the son of this bondwoman shall not be heir with my son, namely with Isaac." And the matter was very displeasing in Abraham's sight because of his son. But God said to Abraham, "Do not let it be displeasing in your sight because of the lad or because of your bondwoman. Whatever Sarah has said to you, listen to her voice; for in Isaac your seed shall be called. Yet I will also make a nation of the son of the bondwoman, because he is your seed." So Abraham rose early in the morning, and took bread and a skin of water; and putting it on her shoulder, he gave it and the boy to Hagar, and sent her away. Then she departed and wandered in the Wilderness of Beersheba.

New Testament (New King James Version)

The Gospel According to John: Chapter 9:35-41 / 10:1-6

 Jesus heard that they had cast him out; and when He had found him, He said to him, "Do you believe in the Son of God?" He answered and said, "Who is He, Lord, that I may believe in Him?" And Jesus said to him, "You have both seen Him and it is He who is talking with you." Then he said, "Lord, I believe!" And he worshiped Him. And Jesus said, "For judgment I have come into this world, that those who do not see may see, and that those who see may be made blind." Then some of the Pharisees who were with Him heard these words, and said to Him, "Are we blind also?" Jesus said to them, "If you were blind, you would have no sin; but now you say, 'We see.' Therefore your sin remains. Chapter 10 "Most assuredly, I say to you, he who does not enter the sheepfold by the door, but climbs up some other way, the same is a thief and a robber. But he who enters by the door is the shepherd of the sheep. To him the doorkeeper opens, and the sheep hear his voice; and he calls his own sheep by name and leads them out. And when he brings out his own sheep, he goes before them; and the sheep follow him, for they know his voice. Yet they will by no means follow a stranger, but will flee from him, for they do not know the voice of strangers." Jesus used this illustration, but they did not understand the things which He spoke to them.