Reference for Sukkah 7:14

מהו דתימא דופן עקומה מרוח אחת אמרינן אבל כל רוח ורוח לא קא משמע לן

But is not this principle identical with the former one? One might have thought that we apply the rule of the ‘curved wall’ on one side only, but not on every side, therefore we were taught [that we apply it to all sides also].

Jastrow