Matt 5:1-26

Vs 19 Whoever therefore breaks one of the least of these commandments and teaches men so, shall be called least in the kingdom of heaven; but whoever does and teaches them shall be called great...

By itself this verse teaches works, in context it identifies bad religion and unreliable leadership. Reading on to the next verse Jesus says 'unless your righteousness exceeds [that of] the scribes and Pharisees you will by no means enter the kingdom...' Obviously this sort of, punch line here does not address why works don't save. Its my presupposition that the people listening got a clear view of the unreliable nature of the leadership, not a prompt to try and 'do better.' The preceding words of the Lord establish that the Law of God will prevail utterly.