Genesis 42:37-38

37Then Reuben spoke to his father, saying, “Kill my two sons if I do not bring him back to you; put him in my hands, and I will bring him back to you.”

38But he said, “My son shall not go down with you, for his brother is dead, and he is left alone. If any calamity should befall him along the way in which you go, then you would bring down my gray hair with sorrow to the grave.”