Exodus 26:1

Moreover, thou shalt make the Tabernacle with ten curtains, long pieces, or strips, corresponding to the canvas of modern tents, of fine twined linen, the silky byssus cloth, and blue, and purple, and scarlet, Exodus 25:4; with cherubim of cunning work shalt thou make them. The work was to be that of an artist in weaving, the meaning evidently being that the white, shiny byssus threads were to be woven with similar fine yarns of hyacinth, purple, and crimson, to form figures of cherubim, the appearance of the cloth afterward being that of a heavy damask.