Reference for Megillah 57:11

אין עושין אותו קפנדריא: מאי קפנדריא אמר רבא קפנדריא כשמה מאי כשמה כמאן דאמר אדמקיפנא אדרי איעול בהא

It should not be used as a short cut [kapandria]. What is kapandria? Rava said: Kapandaria is as its name implies.... What does its name imply? As if one were to say, Instead of going round the building [makifna adare], I will enter here.

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