'Strangers' in the Bible

He saith, Yes. And when he was come into the house, Jesus prevented him, saying, What thinkest thou, Simon? of whom do the kings of the earth take custom or tribute? of their own children, or of strangers?

Peter saith unto him, Of strangers. Jesus saith unto him, Then are the children free.

And they took counsel, and bought with them the potter's field, to bury strangers in.