Proof, in context, please.
Rather Jesus, (and Paul, John, Peter, etc) taught that man CANNOT keep the commandments! Read Mark 10, John 3, Romans 3, etc.! Paul explicitly stated in Romans 3:10
because by the works of the Law no flesh will be justified in His sight; for through the Law comes the knowledge of sin.
Just search 'commandments' in the New Testament on crosswalk.com
The one that some of these good Christians on FR seem to forget is 'Love the neighbor'. They don't even try. Sad.