16,374
edits
Reference of Measurements in Halacha: Difference between revisions
From Halachipedia
Reference of Measurements in Halacha (view source)
Revision as of 16:21, 2 January 2013
, 2 January 2013Text replace - "kezayit " to "Kezayit "
m (Text replace - "Kezayit " to "Kezayit ") |
m (Text replace - "kezayit " to "Kezayit ") |
||
| Line 2: | Line 2: | ||
# According to Ashkenazim, all sizes are measured in volume and not weight.<Ref> Mishna Brurah 456:3, Vezot HaBracha (pg 6) </ref> However, according to Sephardim the actual halacha is that measures are in volume but the minhag is to follow the measures in weight. <ref>See Yalkut Yosef (Klalei Brachot pg 195-202) discusses this at length. </ref> | # According to Ashkenazim, all sizes are measured in volume and not weight.<Ref> Mishna Brurah 456:3, Vezot HaBracha (pg 6) </ref> However, according to Sephardim the actual halacha is that measures are in volume but the minhag is to follow the measures in weight. <ref>See Yalkut Yosef (Klalei Brachot pg 195-202) discusses this at length. </ref> | ||
# There’s a dispute in the Rishonim whether the [[Kezayit]] (olive size) is a half or third of a [[KeBaytzah]] (egg size), and regarding Bracha Achrona and Deoritta Mitzvot, the halacha follows the opinion that a [[Kezayit]] is half a KeBeytzah. <Ref> | # There’s a dispute in the Rishonim whether the [[Kezayit]] (olive size) is a half or third of a [[KeBaytzah]] (egg size), and regarding Bracha Achrona and Deoritta Mitzvot, the halacha follows the opinion that a [[Kezayit]] is half a KeBeytzah. <Ref> | ||
* Mishna Brurah 486:1 writes that the Tosfot holds a | * Mishna Brurah 486:1 writes that the Tosfot holds a [[Kezayit]] is half of a KeBeitzah with the shell and the Rambam holds it is a third of a KeBeitzah (see Tosfot (Yoma 80b D”H Agav), Rambam (Eiruvin 1:9)). S”A 486 rules like Tosfot. Rav Avraham Chaim Noeh (Shiurei Torah 3:12) argues that Tosfot holds half a KeBeitzah without the shell. | ||
* What's the halacha? Mishna Brurah 486:1 rules that for Deoritta Mitzvot and Bracha Achrona, one should eat the size of half a KeBeitzah, but for Derabbanan Mitzvot, one third suffices. He adds that since one has to make a Bracha on maror, one should eat half a KeBeitzah. </ref> | * What's the halacha? Mishna Brurah 486:1 rules that for Deoritta Mitzvot and Bracha Achrona, one should eat the size of half a KeBeitzah, but for Derabbanan Mitzvot, one third suffices. He adds that since one has to make a Bracha on maror, one should eat half a KeBeitzah. </ref> | ||
# According to Rav Chaim Noeh, the [[Kezayit]] for Deoritta measures (eating Matzah) and Bracha Achrona is 27cc. The Chazon Ish’s opinion is that the [[Kezayit]] is 33.3 grams (1.3 oz). <ref> | # According to Rav Chaim Noeh, the [[Kezayit]] for Deoritta measures (eating Matzah) and Bracha Achrona is 27cc. The Chazon Ish’s opinion is that the [[Kezayit]] is 33.3 grams (1.3 oz). <ref> | ||
| Line 8: | Line 8: | ||
* Practically, how much is a Kezayit? | * Practically, how much is a Kezayit? | ||
**(1) Rav Chaim Noeh in Shiurei Torah (3:11, pg 191, 5707) writes that for Deoritta Mitzvot one should eat 28.8cc, however, in Shiurei Tzion (p. 70, 5709) he writes that it is 27cc. Vezot HaBracha (Birur Halacha 1) explains that Rav Chaim Noeh retracted from his original ruling. | **(1) Rav Chaim Noeh in Shiurei Torah (3:11, pg 191, 5707) writes that for Deoritta Mitzvot one should eat 28.8cc, however, in Shiurei Tzion (p. 70, 5709) he writes that it is 27cc. Vezot HaBracha (Birur Halacha 1) explains that Rav Chaim Noeh retracted from his original ruling. | ||
**(2) Rav Chaim Kanievsky in Shiurin Shel Torah (p. 66) quotes the Chazon Ish that a [[Kezayit]] is 2/3 of a modern egg and an egg can possibly be up to 55cc. Therefore, Vezot HaBracha (Birur Halacha 1) writes that the Chazon Ish holds that 33.3cc is a Kezayit. The Chazon Ish's opinion of | **(2) Rav Chaim Kanievsky in Shiurin Shel Torah (p. 66) quotes the Chazon Ish that a [[Kezayit]] is 2/3 of a modern egg and an egg can possibly be up to 55cc. Therefore, Vezot HaBracha (Birur Halacha 1) writes that the Chazon Ish holds that 33.3cc is a Kezayit. The Chazon Ish's opinion of [[Kezayit]] is partially based on the opinion of the Tzlach. | ||
**(3) Vezot HaBracha (Birur Halacha 1) quotes Haggadat Kol Dodi which quotes Rav Moshe Feinstein as saying that a [[Kezayit]] is 31.2cc. [However, Rabbi Bodner in Halachos of K’zayis (p. 24) writes that Rav Dovid Feinstein told him that Rav Moshe never measured the eggs himself and it was his student who calculated 1.1oz, but that if his calculations were more precise he should use those. Therefore, Rabbi Bodner rules, based on his own calculations, that a [[Kezayit]] is 27.2cc.]</ref> | **(3) Vezot HaBracha (Birur Halacha 1) quotes Haggadat Kol Dodi which quotes Rav Moshe Feinstein as saying that a [[Kezayit]] is 31.2cc. [However, Rabbi Bodner in Halachos of K’zayis (p. 24) writes that Rav Dovid Feinstein told him that Rav Moshe never measured the eggs himself and it was his student who calculated 1.1oz, but that if his calculations were more precise he should use those. Therefore, Rabbi Bodner rules, based on his own calculations, that a [[Kezayit]] is 27.2cc.]</ref> | ||
## The minhag of the world and many other authorities is to follow Rav Chaim Noeh’s opinion. <Ref> Vezot HaBracha (pg 6, Birur 1, pg 221) quotes Rav Elyashiv and Rav Shlomo Zalman saying that for Bracha Achrona the widely accepted measurement of the [[Kezayit]] is according to Rav Chaim Noeh. Vezot HaBracha also mentions that such is the minhag of the world. </ref> | ## The minhag of the world and many other authorities is to follow Rav Chaim Noeh’s opinion. <Ref> Vezot HaBracha (pg 6, Birur 1, pg 221) quotes Rav Elyashiv and Rav Shlomo Zalman saying that for Bracha Achrona the widely accepted measurement of the [[Kezayit]] is according to Rav Chaim Noeh. Vezot HaBracha also mentions that such is the minhag of the world. </ref> | ||
