הלכות תפילה ונשיאת כפים

A person who prayed without concentrating [on his prayers] must pray a second time with concentration. However, if he had concentrated during the first blessing, nothing more is necessary.A person who errs in the recitation of the first three blessings [of the Shemoneh Esreh] must return to the beginning [of the Shemoneh Esreh]. Should one err in the recitation of the final three blessings, one should return to [the blessing, R'tzey]. If one errs in the midst of [one of] the intermediate blessings, one should return to the beginning of that blessing and [then] conclude one's prayers in the [proper] order.Should the leader of the congregation err when he is praying out loud, he should [correct himself] based on these principles.

However, if the leader of the congregation errs while he is praying in a hushed tone, I maintain that he does not repeat his prayers a second time, because of the difficulty it will cause the congregation. Rather, he relies on the prayer which he will recite out loud.The above applies when he does not err in the first three blessings. If he errs in their [recitation], he always repeats [his prayers] in the same manner as any [other] individual.

Should the leader of a congregation err [in his repetition of the Shemoneh Esreh], become confused and not know where to begin [again] - if he waits for a prolonged period, another person should replace him.If he errs in the recitation of the blessing [that curses] the heretics, we do not wait for him [to correct himself]; rather, another person should replace him. This applies only when he did not begin this [blessing]. However, if he did begin [the blessing], we wait for him.The second person should not refuse at this time.

From which point should [the substitute for the leader of the congregation] begin? If the first one erred in one of the intermediate blessings, [the substitute] should begin from the beginning of the blessing in which he erred. However, if he erred in one of the first three blessings, the [substitute] starts from the beginning [of the Shemoneh Esreh. If he erred in one of the final [three] blessings, the substitute should begin from [the blessing, R'tzey].

A person who says, "I will not lead the congregation in prayer because [I am wearing] colored clothes," should not lead the congregation in that prayer service even when wearing white clothes. If he said, "I will not lead the congregation because I am wearing sandals," he should not lead the congregation even when barefoot.

A person who is in doubt whether he prayed or not should not repeat his prayers, unless he recites the second prayer with the intention that it is a voluntary prayer, since an individual may recite voluntary prayers throughout the entire day.A person who remembers that he has already prayed while he is in the midst of the Shemoneh Esreh should cease [praying] immediately, even if he is in the midst of a blessing. [However,] if he was reciting the evening service, he need not cease [praying], for even at the outset, he did not begin that prayer service with the thought that it was an obligation.

A person who erred and recited a weekday prayer on the Sabbath does not fulfill his obligation. If he recalled while he was in the midst of the Shemoneh Esreh, he should conclude the blessing which he has begun and [continue] reciting the Sabbath prayers.When does the above apply? In the evening, morning, and Minchah services. However, in the Musaf service, one should cease [praying] even in the midst of a blessing. Similarly, if one completed a weekday Shemoneh Esreh with the intention that it be one's Musaf prayers, one must recite Musaf again. This applies on the Sabbath, on a festival, and on Rosh Chodesh.

[When] one errs during the rainy season and does not recite either morid hageshem or morid hatal, he must return to the beginning of the prayers. However, if he mentions dew, he need not repeat [his prayers].Should one err in the summer and recite morid hageshem, he must return to the beginning of the prayers. However, if he omits mention of dew [in the summer], he need not repeat his prayers, for dew is never held back, nor is there a need to request it.

[The following rules apply when] one forgets to request rain in the blessing for material prosperity: If he remembers before [the blessing,] shome'a tefilah, he should request rain in [that blessing]. If he [recalls] after reciting the blessing, shome'a tefilah, he should return to the blessing for material prosperity. If he does not recall until after he completes the Shemoneh Esreh, he must return to the beginning of the prayer and pray a second time.

[The following rules apply when] a person errs and fails to mention Ya'aleh v'yavo: If he remembers before he has concluded the Shemoneh Esreh, he should return to [the blessing, R'tzey], and recite it. If he remembers after he has concluded his prayers, he must repeat the Shemoneh Esreh from the beginning. If he is accustomed to recite supplicatory prayers after Shemoneh Esreh and remembers after he has concluded his prayers, but before he has lifted up his feet [to step backwards after prayer], he should return to [the blessing, R'tzey].

In every case in which an individual is required to repeat his prayers [because of an error], the leader of the congregation is also required to repeat his prayers if he made a similar mistake while praying out loud, with the exception of the morning service of Rosh Chodesh.[In this instance,] if the leader of the congregation failed to mention Ya'aleh v'yavo before completing his prayers, he is not required to repeat his prayers because of the difficulty it would cause the congregation. The Musaf service is still to be recited and Rosh Chodesh will be mentioned there.