Exodus 26:31, 33

“You shall make a veil woven of blue, purple, and scarlet thread, and fine woven linen. It shall be woven with an artistic design of cherubim.

And you shall hang the veil from the clasps. Then you shall bring the ark of the Testimony in there, behind the veil. The veil shall be a divider for you between the holy place and the Most Holy.