GENESIS 16: 1 - 6
1: And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
2: That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.
3: And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.
4: There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
5: And GOD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.
6: And it repented the LORD that he had made man on the earth, and it grieved him at his heart.
GENESIS 18: 1 - 15
1: And the LORD appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;
9: And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent.
10: And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.
11: Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.
12: Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?
13: And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?
14: Is any thing too hard for the LORD? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son.
15: Then Sarah denied, saying, I laughed not; for she was afraid. And he said, Nay; but thou didst laugh.
GENESIS 21: 1 -7
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.