Rashi on Exodus 26:31/רש"י על שמות כ״ו:ל״א

1פרכת is a term denoting a partition; in the language of the Sages (in Rabbinical Hebrew) פרגוד is something which separates the king from the people (Berakhot 18b).

2תכלת וארגמן BLUE PURPLE, AND RED PURPLE — every material was intertwined in each strand by six threads (Yoma 71b).

3מעשה חשב THE WORK OF AN ARTIST — I have already explained (v. 9) that this is a weaving on the two surfaces, the designs on the two sides not being similar to one another.

4כרבים CHERUBIM — i. e. he shall make on it figures of different creatures.