Genesis 42:37-38

37Then Reuben said to his father, “You may kill my two sons if I don’t bring Benjamin back to you. I’ll be responsible for him, and I promise to bring him back.”

38But Jacob replied, “My son will not go down with you. His brother Joseph is dead, and he is all I have left. If anything should happen to him on your journey, you would send this grieving, white-haired man to his grave.”