Genesis 42:6-7

6Since Joseph was governor of all Egypt and in charge of selling grain to all the people, it was to him that his brothers came. When they arrived, they bowed before him with their faces to the ground.

7Joseph recognized his brothers instantly, but he pretended to be a stranger and spoke harshly to them. “Where are you from?” he demanded. “From the land of Canaan,” they replied. “We have come to buy food.”