Yaakov and the Foundation Stone
Both on his way out of Eretz Yisrael, before his marriage, and during his last years in Egypt, Yaakov always had in mind his responsibility for laying the foundation for the Sanctuaries that his descendants would someday erect.
The stone that Yaakov had set up as a matzeiva (pillar), after sleeping and experiencing a prophetic dream on what would someday become the Temple Mount was, writestheOhr Hachayim HaKadosh, theEven Shetiah (Foundation Stone). This was the stone from which the creation of the world began, and upon it would rest the Holy Ark in the Beit Hamikdash.
While in Egypt, Yaakov planted the cedar trees whose wood his descendants would take with them on their way out of bondage to use for the boards of the Mishkan sanctuary.
Yaakov thus laid the foundation for the Sanctuary in which his posterity would serve Hashem on their way to Eretz Yisrael, and for the Beit Hamikdash they would build in Yerushalayim.