Genesis 42:4-8

But Jacob did not send Joseph’s brother Benjamin with his brothers, for he said, “I am afraid that harm may happen to him.”

So the sons of Israel came to buy grain among those who were coming, because the famine was also in the land of Canaan.

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

When Joseph saw his brothers, he recognized them, but he disguised himself to them and spoke to them harshly. He said to them, “Where have you come from?” And they said, “From the land of Canaan, to buy food.”

But Joseph had recognized his brothers, although they did not recognize him.