Thanks squeak, I learned that gemara too. There are differing opinions to what the story actually was.
The text to the Shuchan Aruch and Mishna Brura reference can be seen on line by going to (see also the Sharei T’shuva on the page):
http://www.hebrewbooks.org/pdfpager.aspx?req=14171&pgnum=94&hilite=