"SEYAG LA-TORAH (;. fence around the law), preventive rabbinic injunction whose purpose is to safeguard the observance of biblical commandments. The sanction for such safeguards is found in Avot 1.1. . . . The “fence” consisted of an added level of stringency. . . ."
"SEYAG LA-TORAH" The Oxford Dictionary of the Jewish Religion. Ed. Adele Berlin and Maxine Grossman.Copyright © 2011 by Oxford University Press, Inc.. The Oxford Dictionary of the Jewish Religion: (e-reference edition). Oxford University Press. Seattle Pacific University. 2 April 2012 http://ezproxy.spu.edu/login?url=http://www.oxford-jewishreligion.com/entry?entry=t322.e2825.