Some have the custom during the Aseret Yemei Teshuvah (the Ten Days of Repentance) to say more than ten mizmorim of Tehillim, in order to complete the entire book during this time.
Sources and Explanations
Thus writes the Mateh Efraim (581:8).
From the sefer “Shaf Veyativ – Laws of Saying Tehillim” by Rabbi Shay Tahan, Chapter 2: The Proper Times for Saying Tehillim, Halacha 25 (p. 30 in the print edition). Translated from the Hebrew original.
