Genesis 42:6-7

6Now Joseph was governor over the land; and it was he who sold to all the people of the land. And Joseph’s brothers came and bowed down before him with their faces to the earth.

7Joseph saw his brothers and recognized them, but he acted as a stranger to them and spoke roughly to them. Then he said to them, “Where do you come from?” And they said, “From the land of Canaan to buy food.”