Psalm 27 (l’David) is recited daily from Rosh Chodesh Elul through Shemini Atzeres. This verse, with its reference to a succah, is the source of our practice to recite this psalm throughout Succos. This is not the context of the verse, however. The ibn Ezra says that the shelter is Jerusalem. Rashi is even more precise: he says that the shelter is specifically the Temple.