I know that sometimes when warming something in a not kosher oven or a milchig food in a fleishig oven, he double wraps the food. When is this necessary and why?
In parshas Lech Lecha, the Torah (Bereishis 14:14) refers to the chanichav, the people trained by Avraham Avinu to believe in Hashem and observe His mitzvos.
Who is Obliged, and Who is Exempt from Chanukah Candles
Fulfilling the Mitzvah in the following cases, according to the Sephardic and Ashkenazi customs: lighting in the Synagogue, travelers, women, single and married children living at home and away from home, Yeshiva students, soldiers, roommates, mourners, and blind persons.
Some Light Chanukah Questions. Eating in one house ans sleeping in another, when is the optimal time to kandle the Menora? Lighting candles in a Hotel, Where does a Yeshiva Bachur light? and more....