#mishnah

“Akarpef, walled off, must be square,
Else on Shabbos, you can’t carry there,”
Eliezer would say,
“But if square, then you may,
Even if it be 200 ares.”

When at war, skip the wash before eating;
You may take dried-out kindling for heating;
Eruv building? Say “Bye!”;
Bypass tithingdemai.
Lives at risk if your force takes a beating!

If you want to camp out on the slopes,
Make some “walls” for yourself from three ropes,
With the space between cords,
Less than three hands (like boards).
Ten hands high, and no “goat gaps”, one hopes.

The sages declared that the stick
‘Cross the the top must support half a brick.
(That is, able to take
The weight with no break,
And side-to-side one tefach thick.)

Very far from his house, our friend Steve,
Coming home from a trip Friday eve,  
Spies a landmark – a tree!
“By its trunk, home will be!”
And by this, he caneruvachieve.

WithShabbosandchagimadjacent,
A guy said of two eruvsnascent,
“One’s for now, one tomorrow.”
Ruled the rabbis with sorrow,
“That won’t work; find an agent complaisant.”

“If the goys appear east, I’ll go west,
If from west, then I think east is best.”
(Twoeruvimpreset,
See which terms have been met.)
Such conditional statements are blessed.

If the eruv was burnt, or did roll
Past the limit where someone can stroll,
Shabbat Eve before night
I’m afraid that’s a plight,
Since it’s gone ereShabbat took control.

Ten handbreadths or more up a tree
Aneruv is not meant to be.
Below that, it’s fit.
And if placed in a pit,
It is good even down half ali.