Genesis 42:6, 23, 27

Now 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.

But they did not know that Joseph understood them, for he spoke to them through an interpreter.

But as one of them opened his sack to give his donkey feed at the encampment, he saw his money; and there it was, in the mouth of his sack.