'Veil' in the Bible

And when the camp setteth forward, Aaron and his sons shall go in, and they shall take down the veil of separation and cover the ark of testimony with it;

But thou and thy sons with thee shall attend to your priesthood for all that concerneth the altar, and for that which is inside the veil; and ye shall perform the service: I give you your priesthood as a service of gift, and the stranger that cometh near shall be put to death.