Mistake in the Musaf Prayer on Rosh Chodesh that Fell on Shabbat
This question and answer were automatically translated using our trained AI and have not yet been reviewed by a qualified rabbi. Please treat this translation with caution.
go to original →
Question
Hello and blessings, Last Shabbat, which was Rosh Chodesh Tammuz, I made a mistake in the conclusion of the Musaf prayer. Instead of concluding the blessing with 'Who sanctifies the Shabbat, Israel, and the New Moons,' I concluded with 'Who sanctifies the Shabbat, Israel, and the Festivals.' My question is whether I needed to repeat the Musaf prayer due to this mistake (and although what happened has happened, I still wish to know if I acted correctly and what the halacha is for the future). It is important to emphasize that the question is about Rosh Chodesh that falls on Shabbat, because regarding Rosh Chodesh that falls on a weekday, it is already written in 'Halichot Shlomo' (Tefillah, Chapter 15, Section 9) that saying 'Festivals' instead of 'New Moons' is considered a change in the formula of the blessing and one must repeat it. However, my question is about Rosh Chodesh that falls on Shabbat, where it is written in 'Mishna Berura', Siman 425, Section 15, that if one concluded only for Shabbat and did not mention Rosh Chodesh at all, one has fulfilled the obligation. According to this, if I had not said 'Festivals' at all but only 'Who sanctifies the Shabbat,' I would have fulfilled the obligation in a post-factum situation. My question is whether saying 'Israel and the Festivals' is worse than saying 'Who sanctifies the Shabbat' alone and requires repetition, or perhaps it is not worse and does not require repetition. Thank you in advance.
Answer
Hello Rabbi
You need to repeat the prayer.
Source
According to the instructions of the Gaon, Rabbi Ovadia Fried, shlita