Hilchot Shabbat 29:3-5 (Eating and drinking before Kiddush and Havdalah)
10:10 am
What is the proper text of Havdalah? If a person did not say Kiddush on Friday night, can he say it the following day? How late in the week can he say Havdalah? And what are the rules regarding eating before Kiddush or Havdalah?
