Yes, Jesus said that He didn't come to destroy the law and the prophets BUT to (fulfill). Once something is fulfilled, it is finished. Anybody who understand prophecy knows that. Once prophecy is fulfilled you don't wait around waiting for it to be fulfilled again. It is finished.
People see that Matthew 5:17 scripture and say, "See, He didn't change anything". Many persons who support tithing love to say, "Jesus didn't change the laws". I wonder if they actually read His sermon on the mount, He was changing all kind of things, in specific (things that were once laws).
Jesus said, ""You have heard that it was said to the people long ago, 'You shall not murder, and anyone who murders will be subject to judgment.'" Law. Jesus went on to say, ""But I say to you that everyone who is angry with his brother shall be guilty before the court; and whoever says to his brother, 'You good-for-nothing,' shall be guilty before the supreme court; and whoever says, 'You fool,' shall be guilty enough to go into the fiery hell" Matthew 5:21-22
Jesus said, "“You have heard that it was said to those of old, ‘You shall not commit adultery.." Law. Jesus went on to say, "But I say to you that whoever looks at a woman to lust for her has already committed adultery with her in his heart." Matthew 5:27-28. He even went on to say in Matthew 5:31-32 "“Furthermore it has been said, ‘Whoever divorces his wife, let him give her a certificate of divorce.’ But I say to you that whoever divorces his wife for any reason except sexual immorality causes her to commit adultery; and whoever marries a woman who is divorced commits adultery."
Jesus said, "“Again you have heard that it was said to those of old, ‘You shall not swear falsely, but shall perform your oaths to the Lord.’" Law. Jesus went on to say, "But I say to you, do not swear at all: neither by heaven, for it is God’s throne; nor by the earth, for it is His footstool; nor by Jerusalem, for it is the city of the great King. 36 Nor shall you swear by your head, because you cannot make one hair white or black. But let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ For whatever is more than these is from the evil one." Matthew 5:33-37
Jesus said, "“You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ Law. Jesus went on to say, "But I tell you not to resist an evil person. But whoever slaps you on your right cheek, turn the other to him also." Matthew 5:38-39
Jesus said, "“You have heard the law that says, ‘Love your neighbor’ and hate your enemy." Law. Jesus went on to say, "But I say, love your enemies! Pray for those who persecute you! In that way, you will be acting as true children of your Father in heaven. For he gives his sunlight to both the evil and the good, and he sends rain on the just and the unjust alike. If you love only those who love you, what reward is there for that? Even corrupt tax collectors do that much. If you are kind only to your friends, how are you different from anyone else? Even pagans do that. But you are to be perfect, even as your Father in heaven is perfect." Matthew 5:43-48
When somebody referring to the law says that Jesus didn't change anything, remind them of this. These are only a few of the things. Jesus fulfilled the entire law. Now who does the Father say we are to listen to? "Then a cloud appeared and covered them, and a voice came from the cloud said: "This is my Son, whom I love. Listen to Him!"" Mark 9:7 Notice Jesus always said, "But I say to you". If we are going to call Him Lord we must do what He says. ""Why do you call me, 'Lord, Lord,' and do not do what I say?" Luke 6:46