Genesis 42:6, 23, 27

Now Joseph was the ruler over the land, and he was the one who sold [grain] to all the people of the land; and Joseph’s [half] brothers came and bowed down before him with their faces to the ground.

They did not know that Joseph understood [their conversation], because he spoke to them through an interpreter.

And at the lodging place, as one of them opened his sack to feed his donkey, he saw his money in the opening of his sack.