'Stranger' in the Bible

And David said unto the young man that told him, Whence art thou? And he answered, I am the son of a stranger, an Amalekite.

Then said the king to Ittai the Gittite, Wherefore goest thou also with us? return to thy place, and abide with the king: for thou art a stranger, and also an exile.

Sons of a stranger feign obedience to me, At the hearing of the ear they hearken to me.

Sons of a stranger fade away, And gird themselves by their close places.