Not to waste the Tzibur's time
by adding a Kapitel Tehillim
The Gaon's Minhag was not to add
לדוד ה' אורי
from R. Chodesh Ellul till Simchas Torah Davening.
The אדרת* writes the reason for not
saying it was because of
טירחא דציבורא.
Saying one extra Kapitel Tehillim takes
up too much time of the Tzibbur.
Perhaps we can explain the Aderes /Gaon,
There is no mention in
בבלי, ירושלמי, ראשונים, טור, שו"ע, כתבי אריז"ל
etc. to say
לדוד ה' אורי
(in Ellul)
The first to mention to say it
בציבור**
is the Sefer
חמדת הימים***
& the Sefer
שם טוב קטן
which are
ספרי קבלה****.
The Gaon, in general, was against adding
additional Tefillos & Pesukim. He tried to stick
to the original Tefillos of the Anshei
Knesses Hagedola.
ONE MINUTE × 100 PEOPLE
A שליח ציבור who starts one minute
late in a Minyan of 100 people, wasted
not one minute but 100 minutes.
(טירחא
of 100 people times 1 minute)
Adding a
קפיטל תהילים
which takes
to say only one minute can at times
be considered taking
100 minutes.
This might explain why the Gaon
considered it
טירחא דציבורא
and didn't add it to the Tefilos during Ellul etc.
א' אלול
most Shuls will be saying
3
קפיטלך תהילים
at end of Davening.
1)
שיר של יום
2)
לדוד ה' אורי
3)
ברכי נפשי
According to the Gaon, we don't say the
regular
שיר של יום
since the
לויים
didn't say it on
Rosh Chodesh & Yom Tov. All you would say is
ברכי נפשי
which was the
שיר של יום
of Rosh Chodesh.
*
הרב אליהו דוד רבינוביץ תאומים
(he was a twin)
**
The Sefer Shem Tov Katan
printed before the Chemdas Hayomim
mentions only to say it
ביחיד.
***
major controversy who the
author was. Some don't say
Ledovid Hashem Ori (Ellul)
claiming the source
is
נתן העזתי ימ"ש
****
I believe the first Halacha Sefer
to say it is the
מטה אפרים