'Holies' in the Bible

This is the service of the sons of Kohath in the tent of meeting, the holy of holies:

but this do to them, and they have lived, and do not die in their drawing nigh the holy of holies: -- Aaron and his sons go in, and have set them, each man to his service, and unto his burden,

in the holy of holies thou dost eat it; every male doth eat it; holy it is to thee.