Genesis 35:2
Then Jacob said unto his household, and to all that were with him, Put away the strange gods that are among you, and be clean, and change your garments:
Genesis 42:7
And Joseph saw his brethren, and he knew them, but made himself strange unto them, and spake roughly unto them; and he said unto them, Whence come ye? And they said, From the land of Canaan to buy food.