Musar על בבא בתרא 148:6

On the day the terrestrial Tabernaclde was erected a parallel Sanctuary was established in the Celestial Regions. This is the reason that the word משכן is repeated in Exodus 38,21: משכן, משכן העדות. G–d displayed as much desire for that which is in hidden regions as for what is revealed in our world. Rabbi Shimon (ben Gamliel) stated in the Midrash Nasso 16 that at the time G–d created the universe, He wished to have a residence in the terrestrial world similar to His residence in the Celestial Regions. This is discussed at length. The reason that G–d did not establish such a residence at that time was the damage caused to the universe by Adam and subsequent generations through their sins. Now a time had come when G–d related to the Jewish people with goodwill and it had become possible to establish His residence in the terrestrial world and to simultaneously establish its counterpart in Heaven. The Tabernacle is perceived as a microcosm and the process of building it was comparable to the steps involved in creating the universe. Midrash Tanchuma on פרשת פקודי explains this in detail. We know that when G–d created the universe, He created everything both male and female (Baba Batra 74b). The commentators explain that this means that G–d created both משפיע, and מושפע, active forces as well as their passive counterparts. This can alternatively be described in terms of the visible forces containing invisible forces. Or, to put it differently: There is constant interaction between cause and effect.

Yalkut Shimoni on Parshat Shoftim understands the repeated reference טבחה, טבחה in Proverbs 9,2, as an allusion to Leviathan and the שור הבר, the "wild ox," auroch, whose meat will be served by G–d to the righteous in the Hereafter (Baba Batra 74b). According to the Aggadah, G–d slaughtered the female Leviathan and salted away its meat in order to serve it in the future at a festive meal for the righteous.