And Joseph was governor in the land of Egypt, and corn was sold by his direction to the people. And when his brethren had bowed down to him, And he knew them, he spoke as it were to strangers somewhat roughly, asking them: Whence came you? They answered: From the land of Chanaan, to buy necessaries of life. And though he knew his brethren, he was not known by them.
Genesis 42:6-8
