Related על שמות 26:33

Another explanation: In relation to this it is written: “art weaving work” and in relation to that it is written: ”color weaving work”. R. Nehemya says: art weaving work [means] two faces, and knitting work [means] one face. Rather, that [curtain] which was taken out from within was folded two and four times and spread out in the upper part opposite to the lower, for it is said: “And the veil shall separate you etc.”.