The word "precept" means a rule or principle that guides behavior or actions. It is like a guideline that tells you how to act or how to do something. Full definition
In Fraser (No 2) the land was conveyed in 1866 on trust for the education of poor persons but was additionally confined to (i) persons in the ecclesiastical district of St Philip; and (ii) education in accordance with the Church of England precepts of the National Society. (newlawjournal.co.uk)
Reform Judaism (known in Europe as Liberal Judaism) seeks to preserve the basic moral precepts of the Torah and other ethical aspects of Jewish tradition — including a passionate concern for social justice. (religion-online.org)