In the Synoptic Gospels, Jesus explicitly states in Matthew 5:17 that he did not come to abolish the Law or the Prophets, but to fulfill them.
Mainstream Christian theology interprets this 'fulfillment' as Jesus perfectly satisfying the legal and sacrificial requirements of the Mosaic covenant, thereby inaugurating a New Covenant where specific ritual laws are no longer binding on believers. Secular historians and Islamic scholars emphasize that during his life, Jesus operated firmly within first-century Judaism, actively practicing and teaching obedience to the commandments of the Torah.