Shabbat · Orach Chaim 415

Yom Tov Adjacent to Shabbat — Eruv Tavshilin

6 questions · 22 opinions

Is eruv techumin (eruv of boundaries) permitted l'chatchila only for a matter of mitzva, or also for optional (reshut) purposes?

4 opinions across 2 eras

Permissible Purposes

What qualifies as a 'matter of mitzva' sufficient to permit making eruv techumin?

4 opinions across 2 eras

Definition of Mitzva Purpose

Is eruv techumin permitted when made out of fear (e.g., fleeing non-Jews or bandits), and does the valid eruv also permit travel for optional purposes?

2 opinions across 2 eras

Fear as Permissible Purpose

May eruv techumin be made b'ein hashmashot (twilight), and if done, is it valid?

4 opinions across 2 eras

Timing — Twilight

When two people commission an agent to make eruv techumin for each of them — one eruv placed before Shabbat and one placed during bein hashmashot, with the first eruv eaten during bein hashmashot and the second eaten after nightfall — do both acquire a valid eruv?

4 opinions across 3 eras

Timing — Dual Eruv Case

What blessing is recited when placing eruv techumin, and is the verbal declaration ('through this eruv...') indispensable?

4 opinions across 2 eras

Blessing and Declaration