Shabbat 25a and Shabbat 25b, finding the source for why we cannot burn ritually impure terumah on Yom Tov, why we can benefit from burning such terumah on non-holidays, how kodashim, sanctified or sacrificial meat, has more stringent rules than terumah. Then, back to Shabbat candles why they are an absolute obligation, and why washing for Shabbat is a preferred activity.
