Genesis 42:6-9

6Joseph had authority to rule Egypt at that time. He was the man who sold food to all the Egyptians. When Joseph's brothers arrived there, they bent down in front of him, with their faces to the ground.

7As soon as Joseph saw the men, he knew that they were his brothers. But he spoke to them as if they were strangers. He did not speak to them in a kind way. He asked them, ‘Where do you come from?’ They replied, ‘We come from the land of Canaan. We have come here to buy food.’

8Joseph recognized his brothers, but they did not recognize him.

9Then Joseph remembered the dream that he had dreamed about his brothers. He said to them, ‘You have come here secretly to see how your people can attack our land.’