Genesis 43:9

43:9 I myself pledge security for him; you may hold me liable. If I do not bring him back to you and place him here before you, I will bear the blame before you all my life.

Genesis 44:32

44:32 Indeed, your servant pledged security for the boy with my father, saying, ‘If I do not bring him back to you, then I will bear the blame before my father all my life.’