1There was a famine in the land, in addition to the first famine that was in the days of Abraham. Isaac went to Abimelech king of the Philistines, to Gerar. 2Yahweh appeared to him, and said, “Don’t go down into Egypt. Live in the land I will tell you about. 3Live in this land, and I will be with you, and will bless you. For I will give to you, and to your offspring, all these lands, and I will establish the oath which I swore to Abraham your father. 4I will multiply your offspring as the stars of the sky, and will give all these lands to your offspring. In your offspring all the nations of the earth will be blessed, 5because Abraham obeyed my voice, and kept my requirements, my commandments, my statutes, and my laws.”
6Isaac lived in Gerar. 7The men of the place asked him about his wife. He said, “She is my sister,” for he was afraid to say, “My wife”, lest, he thought, “the men of the place might kill me for Rebekah, because she is beautiful to look at.” 8When he had been there a long time, Abimelech king of the Philistines looked out at a window, and saw, and, behold, Isaac was caressing Rebekah, his wife. 9Abimelech called Isaac, and said, “Behold, surely she is your wife. Why did you say, ‘She is my sister?’”
Isaac said to him, “Because I said, ‘Lest I die because of her.’”
10Abimelech said, “What is this you have done to us? One of the people might easily have lain with your wife, and you would have brought guilt on us!”
11Abimelech commanded all the people, saying, “He who touches this man or his wife will surely be put to death.”
12Isaac sowed in that land, and reaped in the same year one hundred times what he planted. Yahweh blessed him. 13The man grew great, and grew more and more until he became very great. 14He had possessions of flocks, possessions of herds, and a great household. The Philistines envied him. 15Now all the wells which his father’s servants had dug in the days of Abraham his father, the Philistines had stopped, and filled with earth. 16Abimelech said to Isaac, “Go away from us, for you are much mightier than we.”
17Isaac departed from there, encamped in the valley of Gerar, and lived there.
18Isaac dug again the wells of water, which they had dug in the days of Abraham his father, for the Philistines had stopped them after the death of Abraham. He called their names after the names by which his father had called them. 19Isaac’s servants dug in the valley, and found there a well of flowing water. 20The herdsmen of Gerar argued with Isaac’s herdsmen, saying, “The water is ours.” So he called the name of the well Esek, because they contended with him. 21They dug another well, and they argued over that, also. So he called its name Sitnah. 22He left that place, and dug another well. They didn’t argue over that one. So he called it Rehoboth. He said, “For now Yahweh has made room for us, and we will be fruitful in the land.”
23He went up from there to Beersheba. 24Yahweh appeared to him the same night, and said, “I am the God of Abraham your father. Don’t be afraid, for I am with you, and will bless you, and multiply your offspring for my servant Abraham’s sake.”
25He built an altar there, and called on Yahweh’s name, and pitched his tent there. There Isaac’s servants dug a well.
26Then Abimelech went to him from Gerar with Ahuzzath his friend, and Phicol the captain of his army. 27Isaac said to them, “Why have you come to me, since you hate me, and have sent me away from you?”
28They said, “We saw plainly that Yahweh was with you. We said, ‘Let there now be an oath between us, even between us and you, and let’s make a covenant with you, 29that you will do us no harm, as we have not touched you, and as we have done to you nothing but good, and have sent you away in peace.’ You are now the blessed of Yahweh.”
30He made them a feast, and they ate and drank. 31They rose up some time in the morning, and swore an oath to one another. Isaac sent them away, and they departed from him in peace. 32The same day, Isaac’s servants came, and told him concerning the well which they had dug, and said to him, “We have found water.” 33He called it “Shibah”. Therefore the name of the city is “Beersheba” to this day.
34When Esau was forty years old, he took as wife Judith, the daughter of Beeri the Hittite, and Basemath, the daughter of Elon the Hittite. 35They grieved Isaac’s and Rebekah’s spirits.
Isaac was the son of promise to Abraham and Sarah, and the half-brother of Ishmael (who became the father of the Arab people) and the father of Esau (from whom came the Edomites) and Jacob. Isaac was born of a mother beyond childbearing age by a miracle of Yahweh, and was a focus of the testing of Abraham and Sarah, his parents.
The name Isaac means "to laugh, or he laughs," which is based on the response of Sarah to Yahweh's statement to Abraham that she was to bear a son. Sarah was hiding out of sight when this announcement was made by the Angel of Yahweh, and upon hearing this statement, she laughed, which she denied later before the angel. Such an idea was considered impossible but happened as promised by the heavenly visitor. Later, Abraham's faith was tested when God commanded him to sacrifice his only son, Isaac. He followed through with this command of God but received him back alive, since Yahweh kept him from doing so, declaring that now He knew by experience (see the meaning of Hebrew yada') that Abram did not withhold his son.
Later in Isaac's life, he married Rebekah, who bore him Jacob (biography) and Esau (his favorite), and was tricked by Jacob and Rebekah into giving his younger son Jacob his blessing.
Isaac was the only son of Abraham and Sarah, a half-brother of Ishmael and father of Esau and Jacob. Isaac was born when both of his parents were very old, the circumstances surrounding his birth being a test of their faith. The meaning of Isaac's name (“he laughs”) is explained by the fact that Abraham laughed when he was told a son would be born to him at the age of a hundred. Abraham's faith was further tested when he was told to sacrifice Isaac but was stopped at the last moment from carrying out this instruction.
See also Biographies of Bible Characters, People and Characters in the Bible.