The Mutual Love Between G-d and Israel

How Wooden Beams Prove Perfect Faith

Why does the Torah refer to "the boards," as if we know which boards it is talking about? No boards have yet been mentioned! Furthermore, regarding none of the other utensils in the Mishkan is "the" mentioned; instead it says, "You shall make a menorah… a covering for the tent," etc. Why then are the boards singled out?