'Heads' in the Bible

When they opposed him and blasphemed, he shook out his clothing and said to them, "Your blood be on your own heads! I am clean. From now on, I will go to the Gentiles!"

Take them, and purify yourself with them, and pay their expenses for them, that they may shave their heads. Then all will know that there is no truth in the things that they have been informed about you, but that you yourself also walk keeping the law.

Therefore I beg you to take some food, for this is for your safety; for not a hair will perish from any of your heads."