Genesis 42:1-9

1 Now Ya`akov saw that there was grain in Mitzrayim, and Ya`akov said to his sons, "Why do you look at one another?"
2 He said, "Behold, I have heard that there is grain in Mitzrayim. Go down there, and buy for us from there, so that we may live, and not die."
3 Yosef's ten brothers went down to buy grain from Mitzrayim.
4 But Ya`akov didn't send Binyamin, Yosef's brother, with his brothers; for he said, "Lest perhaps harm befall him."
5 The sons of Yisra'el came to buy among those who came, for the famine was in the land of Kana`an.
6 Yosef was the governor over the land. It was he who sold to all the people of the land. Yosef's brothers came, and bowed themselves down to him with their faces to the eretz.
7 Yosef saw his brothers, and he recognized them, but acted like a stranger to them, and spoke roughly with them. He said to them, "Where did you come from?" They said, "From the land of Kana`an to buy food."
8 Yosef recognized his brothers, but they didn't recognize him.
9 Yosef remembered the dreams which he dreamed about them, and said to them, "You are spies! You have come to see the nakedness of the land."