(I) Romans 3 for sin condemned "Or, by sacrifice for sin"
(b) Romans 8:3 God sending his own son in the likeness of  sinful flesh
"For  he hath made him [to be] sin for us, who knew no sin;  that we might be made the righteousness of God in him." (2 Corinthians 5:21)
"Christ hath redeemed us from the curse of the law, being made  a curse  for  us:  for it is written, Cursed [is]  every  one  that hangeth on a tree:" (Galatians 3:13)