Ha'azinu: Chapter 56
"Remember the days of old, consider the years of many generations..."

Rabbi Aba says that the days of the world are the six days with which God created the world, and that these six days are the Sfirot Chesed, Gvurah, Tiferet, Netzach, Hod and Yesod. When the six days created the world they did it for the sake of the children of Yisrael, so that they would come and study the Torah. If they did not, the world would return to chaos.