Tafsiran Bilangan 3:25: Rashi, Siftei Chakhamim & Chizkuni

המשכן THE DWELLING — i.e. the lower curtains (those which were spread immediately over the boards of the Tabernacle).

The lower drapes. Why were they called the Mishkon — because they were seen from inside when one stood in the Mishkon. Furthermore, the Torah writes “You shall make the Mishkon — ten drapes…” (Shemos 26:1) which refers to the lowest of the four covers, not to the Mishkon as a whole, as in “You shall erect the Mishkon” (Shemos 26:30) (Re’m).

המשכן, this refers to the carpeting of twisted linen which formed part of the roof of the Tabernacle.

והאהל AND THE TENT (the word has not its usual meaning of “tent”; cf. Rashi on Exodus 26:7—12) — i.e. the curtains of goats’ hair that were made as a roofing (to cover the lower curtains).

מכסהו THE COVERING THEREOF — the covering made of rams’ skins and tachash skins (cf. Rashi on Exodus 35:11).

ומסך פתח AND THE SCREEN FOR THE ENTRANCE — i.e. the Veil (cf. Rashi on Exodus 35:12).