Genesis 42:37-38

37Then Reuben said to his father, “You may kill my two sons if I fail to bring him back to you. Put him in my care, and I will return him.”

38But Jacob replied, “My son will not go down there with you, for his brother is dead, and he alone is left. If any harm comes to him on your journey, you will bring my gray hair down to Sheol in sorrow.”