Kabbalah su Genesi 50:78

And everything directs its desire towards "Ad," as written, "to (Heb. עַד ) the utmost bound (or desire) of the everlasting hills" (Beresheet 49:26). Who are the everlasting hills? These are the two matriarchs, females, Jubilee and Sabbatical year. Binah is called Yovel (Eng. Jubilee) and Malchut Shmitah (Eng. Sabbatical year), and both are called "everlasting hills (lit. 'hills of the world')." 'World' as you say "from everlasting to everlasting (lit. 'from the world to the world')" (Tehilim 106:48), meaning Binah and Malchut, for both are called 'world'.