The Counting of the Omer
4. Before reciting the blessing, one should know exactly what the blessing
is being recited over, that is, one should know the day of the Omer that
one will count. However, if one recited the blessing with the intent of
counting the number that one will hear [immediately after] from a
colleague, one fulfills his obligation.
Similarly, if one recited the blessing with the intention of counting it as
the fourth day, and, after reciting the blessing, realized that he should
be counting it as the fifth day, he should count it as the fifth day,
without repeating the blessing. Furthermore, even if he actually counted
in error, for example, he counted it as day five rather than day six, - if
he realized his error immediately (1), he may count the correct day without
reciting a second blessing. If, however, time passed [before he realized
the error], he must recite a second blessing [and then say the correct number].
(1) "Immediately" is defined as the time it takes to say "Shalom Alecha
Rebbe" (Peace be upon you, Rabbi).
Halacha-Yomi, Copyright (c) 2002 Project Genesis, Inc.
MASEI AND THE THREE WEEKS:
They Can Assure a Cure
Rabbi Label Lam - 5773
The Age Of Experience
Rabbi Naftali Reich - 5772
Rabbi Pinchas Winston - 5758
Shlomo Katz - 5760
Rabbi Aron Tendler - 5764
Rabbi Pinchas Winston - 5774
Rabbi Mordechai Kamenetzky - 5758
Ramban: Why was Parshas Nedarim given over specifically to "Roshei haMatos?"
Crossing Holiness to the Other Side of the River
Rabbi Yisroel Ciner - 5757
Rabbi Yissocher Frand - 5768
Shlomo Katz - 5769
Vengeance: Revenge is Sweet
Rabbi Osher Chaim Levene - 5766
Rabbi Pinchas Avruch - 5762
Listen to the Mussar
Rabbi Yissocher Frand - 5762
An Ounce of Prevention
Rabbi Eliyahu Hoffmann - 5758
Setbacks and Comebacks
Shlomo Katz - 5764