Romans 4:16 For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the seed, not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all. (See NAS RSV NIV)
Genesis 44:32 For your servant became collateral for the boy to my father, saying,'If I don't bring him to you, then I will bear the blame to my father forever.' (See NIV)