Genesis 21:8-34 - And the child grew and was weaned. And Abraham made a great feast on the day that Isaac was weaned. But Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, laughing.
Genesis 20 - From there Abraham journeyed toward the territory of the Negeb and lived between Kadesh and Shur; and he sojourned in Gerar. And Abraham said of Sarah his wife, "She is my sister." And Abimelech king of Gerar sent and took Sarah.
Genesis 19 - The two angels came to Sodom in the evening, and Lot was sitting in the gate of Sodom. When Lot saw them, he rose to meet them and bowed himself with his face to the earth and said, "My lords, please turn aside to your servant's house and spend the night and wash your feet.