Yiddish words and phrases in Jewish law

non-Jewish person assisting in a task on Sabbath

right|thumb|220px|A kittel

Text of a Jewish prayer service

250px|right|thumb|A copper blech covers the lit burners on a stovetop, keeping food warm for the Shabbos meal. A blech (from the Yiddish word בלעך () meaning "tin" or "sheet metal", alternatively from Middle High German or Standard German "Blech", meaning tin or sheet metal) is a metal sheet used by many observant Jews to cover stovetop burners (and for some, the cooker's knobs and dials) on Shabbat, as part of the precautions taken to avoid violating the halachic prohibition against cooking on the Sabbath.