Wednesday, July 4, 2012

Using a damp cup for boiling water on Shabbat


One who uses a cup for boiling water, and then wishes to re-fill it, may find that there a few drops of cooled water remain along the walls of the cup.

One may re-fill the cup with boiling water, for two reasons:
1. The drops of water have already been heated, and so many authorities rule that the re-heating is not halachically significant;
2. One has no particular wish to heat up these drops of water.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 4:74:Bishul 19)

Have a great day,

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