How long does a knot have to be tied to be considered a "קשר של קימא". (Knot of permanence).
Various Examples of the Types of Items One Is Not Supposed to Read;
דבר דבר (Dabair Davar): Requests in Davening on Shabbos;
grapes and olives that were crushed before shabbos; whole grapes in wine or grape juicel;