And it came to pass, when God caused me to wander from my father's house, that I said to her, "This is your kindness that you should do for me: in every place, wherever we go, say of me, "He is my brother.""'
Genesis 20:13
Surrounding context
20:12 But indeed she is truly my sister. She is the daughter of my father, but not the daughter of my mother; and she became my wife.
20:13 And it came to pass, when God caused me to wander from my father's house, that I said to her, "This is your kindness that you should do for me: in every place, wherever we go, say of me, "He is my brother.""'
20:14 Then Abimelech took sheep, oxen, and male and female servants, and gave them to Abraham; and he restored Sarah his wife to him.