Reference

Genesis 42:8

And Joseph knew his brethren, but they knew not him.
6

And Joseph was the governor over the land, and he it was that sold to all the people of the land: and Joseph’s brethren came, and bowed down themselves before him with their faces to the earth.

7

And Joseph saw his brethren, and he knew them, but made himself strange unto them, and spake roughly unto them; and he said unto them, Whence come ye? And they said, From the land of Canaan to buy food.

8

And Joseph knew his brethren, but they knew not him.

9

And Joseph remembered the dreams which he dreamed of them, and said unto them, Ye are spies; to see the nakedness of the land ye are come.

10

And they said unto him, Nay, my lord, but to buy food are thy servants come.