<m.Berakhot 6.5>  

A blessing said over the wine taken before the meal serves also for the wine taken after the meal. A blessing over the hors d`oeuvres taken before the meal serves for the sweets taken after the meal. A blessing over bread serves for the sweets but a blessing over the hors d`oeuvres does not serve for the bread. Beth Shammai [CE1] say: Neither [does it serve] for a cooked dish.

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