'Head' in the Bible

Moreover, what are you to Me, O Tyre and Sidon and all the [five small] regions of Philistia? Will you pay Me back for something [I have supposedly done to you]? Even if you do pay Me back, I will swiftly and speedily return your deed [of retaliation] on your own head.

behold, I am going to stir them up from the place where you have sold them [and return them to their land], and I shall return your action [of retaliation] on your own head.