Israelite Temple and Endowment

When considering the possible relationship between ancient Israelite temple system and the LDS Endowment, the first thing to note is the basic purpose of the ancient temple was to reconcile Israel with God and bring all Israel (represented by the twelve stones inscribed with the tribal names) back into the presence of God (that is recapitulating the Sinai theophany), symbolically represented by the Holy Place and Holy of Holies within the veil.

The second thing to note is that Israel had exoteric rituals in the outer courtyard of the temple which could be witnessed by all (though only priests officiated). Esoteric rituals performed inside the temple itself could only be performed and witnessed by priests. LDS Endowment broadly corresponds to the esoteric rituals performed inside the temple, not the exoteric rituals performed outside. The ancient exoteric Israelite temple rituals correspond with the LDS weekly sacrament (the bread/wine offering of the Israelite temple).