Exodus 26:33

And thou shalt hang up the veil under the taches, that is, directly under the seams where the couplings of the goats' hair coverings came together, ten cubits from the west wall, that thou mayest bring in thither within the veil the Ark of the Testimony, the only piece of furniture which was permitted in this part of the Tabernacle; and the veil shall divide unto you between the Holy Place, the eastern end of the Tabernacle, and the Most Holy, its western end.