Pesachim, Chapter 5, Mishnah 9. This mishnah deals with the procedure used for flaying the hide of the Pesach offering.
How They Would Hang and Flay:
The mishnah opens: "Keitzad tolin u'mafshitin? Unkelayos shel barzel hayu kevu'in bakesalim u'va'amudim, shebahen tolin u'mafshitin" - iron hooks were fixed in the walls of the Azarah and in its pillars, and by means of them they would hang the lambs and flay their hides.
One Who Had No Place:
"V'chol mi she'ein lo makom lislos u'lehafshit - maklos dakim chalakim hayu sham, u'maniach al keseifo v'al kesef chaveiro, v'toleh u'mafshit" - someone who had no place to hang his Pesach offering and flay it would make use of the thin, smooth poles that were kept in the Azarah: he would place one end of the pole on his own shoulder and the other end on the shoulder of his friend. These poles were fashioned in a way that allowed the animal to be hung from them, and in this manner he would hang and flay it.
The Fourteenth That Falls on Shabbos:
"Rabbi Eliezer omer: Arba'ah asar shechal lihyos b'Shabbos - maniach yado al kesef chaveiro v'yad chaveiro al keseifo, v'toleh u'mafshit" - when the fourteenth of Nissan, Erev Pesach, falls on Shabbos, Rabbi Eliezer holds that the poles are not designated one hundred percent for the purpose of flaying the Pesach offering, and therefore they have the status of muktzeh. Accordingly, each one places his arm on his friend's shoulder, and in this way a place is created from which the offering can be hung and flayed.
The Root of the Dispute:
The view of the Chachamim (the Tanna Kamma): even if the poles are muktzeh - "ein shevus b'Mikdash," meaning that this rabbinic decree is not applied in the Beis HaMikdash, and therefore they were permitted to use the poles.
The view of Rabbi Eliezer: this is not a necessary shevus, since one can manage by using his arms, and therefore he forbade using the poles on Shabbos.
In summary: in this mishnah we learned the methods of hanging and flaying the Pesach offering in the Azarah - with the iron hooks that were fixed in the walls and pillars, and with the thin, smooth poles for one who had no place. We also examined the dispute between Rabbi Eliezer and the Chachamim regarding an Erev Pesach that falls on Shabbos: whether it is permitted to use the poles on the strength of the rule "ein shevus b'Mikdash," or whether one must suffice with placing his hands on his friends' shoulders.