And he said to them: "You effectively nullify the precept of God, so that you may observe your own tradition
Other versions
King James Version
And he said unto them, Full well ye reject the commandment of God, that ye may keep your own tradition. English Standard Version
And he said to them, "You have a fine way of rejecting the commandment of God in order to establish your tradition!New International Version
And he said to them: "You have a fine way of setting aside the commands of God in order to observe your own traditions!