Chapter 19: 10-12
Laws Pertaining to Additions
10. [On Rosh Chodesh and Chol Hamo'ed, the prayer Ya'aleh v'yovo...(May
there ascend, come...) is added in the blessing R'tzeh.] Should a person
omit this prayer in the morning or afternoon service of Rosh Chodesh or in
the morning, afternoon, or evening service of Chol Hamo'ed: If he
remembered before reciting Yih'yu l'rotzn [at the conclusion of the
Shemoneh Esreh], he must begin his prayers again from R'tzeh. This applies
even if the remembered, before he began to recite the blessing Modim. Since
he concluded the blessing, hamachazir Shechinoso l'Tzion, he must return to
R'tzeh (as mentioned before regarding mashiv horuach). *
* {As long as one has not begun Modim, one may recite Ya'aleh viyovo even
though one has concluded the previous blessing.}
If he remembered before reciting the blessing hamachazir Shechinoso
l'Tzion, he may recite it at that point, and then conclude V'sechezehnoh
eineinu... If he did not remember until after reciting Yih'yu l'rotzon [at
the conclusion of the Shemoneh Esreh], he must recite the Shemoneh Esreh
again from the beginning.
A person who omitted Ya'aleh v'yovo on Rosh Chodesh in the evening service,
after reciting G-d's name in the blessing hamachazir Shechinoso l'Tzion
need not return [to this addition]; rather, he concludes this blessing and
continues his prayers. This applies regardless of whether this occurs on
the first or second night of Rosh Chodesh. The reason is that the new month
was not declared at night.
11. A person who omitted Ya'aleh v'yovo in the morning service of either
Rosh Chodesh or Chol Hamo'ed must repeat the morning service, even if he
recalls his omission only after he recited the musaf service (in which he
mentioned Rosh Chodesh or Chol Hamo'ed). If the time for the morning
service has passed, he must compensate for it in the afternoon service, as
explained in Chapter 21, Law 4. See also Chapter 20, Law 10.
12. Whenever, a person must repeat the Shemoneh Esreh, he must wait at
least the time it takes to walk four cubits before he begins again.
