Matthew 5:17-19

17 "Don't think that I have come to abolish the Torah or the Prophets. I have come not to abolish but to complete.
18 Yes indeed! I tell you that until heaven and earth pass away, not so much as a yud or a stroke will pass from the Torah -- not until everything that must happen has happened.
19 So whoever disobeys the least of these mitzvot and teaches others to do so will be called the least in the Kingdom of Heaven. But whoever obeys them and so teaches will be called great in the Kingdom of Heaven.

Matthew 5:17-19 In-Context

15 Likewise, when people light a lamp, they don't cover it with a bowl but put it on a lampstand, so that it shines for everyone in the house.
16 In the same way, let your light shine before people, so that they may see the good things you do and praise your Father in heaven.
17 "Don't think that I have come to abolish the Torah or the Prophets. I have come not to abolish but to complete.
18 Yes indeed! I tell you that until heaven and earth pass away, not so much as a yud or a stroke will pass from the Torah -- not until everything that must happen has happened.
19 So whoever disobeys the least of these mitzvot and teaches others to do so will be called the least in the Kingdom of Heaven. But whoever obeys them and so teaches will be called great in the Kingdom of Heaven.
20 For I tell you that unless your righteousness is far greater than that of the Torah-teachers and P'rushim, you will certainly not enter the Kingdom of Heaven!
21 "You have heard that our fathers were told, `Do not murder,'l and that anyone who commits murder will be subject to judgment.
Complete Jewish Bible Copyright 1998 by David H. Stern. Published by Jewish New Testament Publications, Inc. All rights reserved. Used by permission.