Latest / Matmonim: Daf Yomi by Rabbi David Lapin

Kiddushin 41a When Effort is More Important than Outcome - מצוה בו יותר מבשלוחו
Hishtadlut means more than “trying”, it means investing effort: The effort to prepare for Shabbat is an essential fulfilment of the mitzva to honor the Shabbat, as such it should not be delegated.
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