Sukah 55a- More is Less- אין אומרים שני מזמורים ביום אחד

Matmonim: Daf Yomi by Rabbi David Lapin - A podcast by Rabbi David Lapin

The idea that more is often less is a foundational principle in the work of the Vilna Gaon who generally strips laws and customs to their essences. Our page is a source for his approach.