'Heads' in the Bible

Then Moses said to Aaron and to his [younger] sons Eleazar and Ithamar, “Do not uncover your heads nor let your hair hang loose nor tear your clothes [as expressions of mourning], so that you will not die [also] and so that He will not express His wrath and anger toward all the congregation. But your relatives, the whole house of Israel, may mourn the burning which the Lord has brought about.

You shall not trim and round off the side-growth of [the hair on] your heads, nor mar the edges of your beard.

The man who lies [intimately] with his father’s wife has uncovered his father’s nakedness; both of them shall most certainly be put to death; their blood is on them.

If a man lies [intimately] with his daughter-in-law, both of them shall most certainly be put to death; they have committed incest; their blood is on them.

The priests shall not shave their heads, nor shave off the edges of their beards, nor make any cuts in their body.