Genesis 20:13

And when God caused me to wander from my father's house, I said to her, 'This is the kindness you must do me: at every place to which we come, say of me, "He is my brother."'

When God caused me to wander from my father’s house, I said to her, ‘This is your kindness which you shall show to me. Everywhere that we go, say of me, “He is my brother.”’”