Halacha:

Tzom Gedalia 

Machshava:

Tzom Gedalia 

Collections: R' Rosner Famous Gemaras

References: Nidah: 61a  

Description

For more on משקל החסידות, see "שטרן - צום גדליה" (skip to 18:37). See also Rav Rosner's "יתרו - הקדמת אבי עזרי" (skip to 08:53). See also Rav Rosner's Daf Yomi Bava Basra 73 (skip to 24:06).