Mi Yodeya is a question and answer site for those who base their lives on Jewish law and tradition and anyone interested in learning more. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have this question on Rashi every year in Ki Savo. Deuteronomy 28:23 says: "And the heavens above your head will be like copper and the earth that is beneath you, iron." Rashi says that the heavens will be “mazi’in” as copper is “mazi’a” and as a result there will not be destruction (avadon) through dryness (chorev) in the world (my translation). What does Rashi mean? How is copper “mazi’a” in a way that iron is not?

share|improve this question
here is the archive of that site, which renders it 'sweats'. Dave's answer, below, seems right. web.archive.org/web/20090619193836/http://www.chabad.org/… – josh waxman Sep 14 '11 at 12:42
up vote 6 down vote accepted

This site argues, somewhat convincingly (based on Rashi and Maharsha), that the reference is to the patina (oxides) that emerges on the surface of copper. Iron in those days always had a layer of rust, and therefore was not considered to "sweat" any kind of substance.

share|improve this answer
Thank you. What is the function of www.tzura.co.il? – Avrohom Yitzchok Sep 18 '11 at 15:37
Seems to be a site where people can submit articles and poetry. – Dave Sep 18 '11 at 16:18

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.