Genesis 42:15

42:15 You will be tested in this way: As surely as Pharaoh lives, you will not depart from this place unless your youngest brother comes here.

Genesis 42:20

42:20 But you must bring your youngest brother to me. Then your words will be verified and you will not die.” They did as he said.

Genesis 43:29

43:29 When Joseph looked up and saw his brother Benjamin, his mother’s son, he said, “Is this your youngest brother, whom you told me about?” Then he said, “May God be gracious to you, my son.”