Required Amount of Matzah and Wine for the Seder: Difference between revisions

## Rabbi Shimon Eider (Halachos of Pesach p. 229) writes that according to his measurements, the Revi’it is 3 fl oz. Rabbi Dovid Feinstein (Kol Dodi Haggadah, 5730, p. 4) writes that based on measuring large eggs a Revi’it is fl 3.3 oz. In the 5745 edition, however, he says that the Revi’it is fl 2.9 oz. See also Rabbi Yisroel Bodner (Halachos of K’zayis p. 24 n. 24) who writes that he spoke to Rav Dovid Feinstein about how he arrived at his measurements and was told that his father, Rav Moshe Feinstein, didn't measure it himself but rather a student measured 'large' eggs and came up with 2.2 fl oz per egg. Rav Dovid added, if he, Rav Bodner, arrived at a smaller measure with his own measurements he should follow that. Rav Bodner writes that according to his measurements the average egg was 55cc (1.92 fl oz). Nonetheless, in terms of Bracha Achrona Rav Bodner (p. 26) follows the measurements of Rav Chaim Noeh who measured the average egg to be 57cc. </ref>

## Rav Yisrael Belsky (OU Pre-Pesach Webcast 5771, min 37-8), who recommended having a Revi’it of 4.3 fl oz.

# According to Ashkenazim, one should preferably have an entire Reviyit which is 3 oz (85 grams), however, if that's difficult one may just have majority of a Reviyit which is 1.51 oz (43 grams). <ref>Haggadah Kol Dodi (Rabbi Dovid Feinstein, 5730, pg 4) writes that the [[Reviyit]] for the four cups (using the method of measuring a large egg) should be 3.3oz. Halachos of [[Pesach]] (Rabbi Shimon Eider, Chapter 20, Sec D 5, pg 228-230) writes that since the four cups are Derabbanan one may have the smaller measurement which is measuring by eggs and not by thumbs and according to his calculation a Reviyit should be 3 oz and if one is unable to have a Reviyit one fulfills one's obligation with a majority of a Reviyit. The Laws of [[Pesach]] by Rabbi Blumenkrantz (5771 pg 111) writes that since the four cups are Derabbanan one may use a cup that holds 2.9 oz. See also Weekly Halacha (by Rabbi Neustadt, http://www.torah.org/advanced/weekly-halacha/5760/tazria.html) who writes that one may rely on the view of Rav Chaim Noeh who holds that 3 oz is sufficient being that the cups of wine are Derabbanan. See also

Rav Yisrael Belsky on [http://www.ou.org/torah/article/oukosher_pre-pesach_webcast_5771 OU Pre-Pesach Webcast 5771] between minutes 37 and 38 who says that it's acceptable to consider a Reviyit 4.3 oz and it’s preferable to consider it around 5.8. See also Halachos of [[Pesach]] (pg 229) who writes that the Kiddish cup of Rav Yisrael Salanter was 4.1 oz at it's full capacity and the cup of the Chafetz Chaim was 5 oz. </ref>