The laws taught in the Talmud are: (i) those which are directly or indirectly derived from the text of the Pentateuch; they are called “laws derived from the Torah” (‏מן התורה‎ or ‏מדאורייתא‎); (2) those which trace their origin to the time of Moses, or, in general, to the remote past; they are called ‏הלכה למשה מסיני‎ “Law given to Moses on Sinai;” (3) those laws which originated between the period of the Pentateuch and the close of the Bible; they are called ‏דברי קבלה‎ (“words of tradition”); (4) those which have been introduced in post-Biblical times; they are laws ‏מדרבנן‎ “laws introduced by our teachers.” These are either preventives against breaking any of the Divine precepts, and are then called ‏מרותגזרות‎ or ‏סיג‎ “a fence,” or tekanoth (‏תקנות‎ “institutions” or “regulations”) made in order to ensure obedience to the Law and improvement of conduct, to remove abuses and prevent error and misunderstanding; (5) Minhag, “Custom” (‏מנהג‎); religious practices which have not been introduced by any authority or based on a particular Biblical text, but in consequence of long usage have become as sacred as a law established by the proper authority. These laws, as finally settled, were again codified, in various works, the most important of which are the following two: (1) Mishneh-torah (‏משנה תורה‎ or ‏יד החזקה‎ [16] lit. “Copy of the Law,” or “Strong Hand”), by Moses Maimonides (twelfth century) in fourteen books; (2) Shulchan-aruch (‏שלחן ערוך‎, lit. “Table-arranged”), by Rabbi Joseph Caro (sixteenth century). Ninth Principle.—“I firmly believe that this Law will not be changed, and that there will not be any other Law given by the Creator, blessed be His Name.”