Psalms 54:3

For strangers are risen up against me, the reference being chiefly to the Ziphites, and oppressors seek after my soul, their object being to bring about his death; they have not set God before them. Selah. The Ziphites were not actuated by the fear of God in treacherously making known David's hiding place, they were not performing a duty which their loyalty to Saul might have demanded of them, but proved themselves strangers, degenerate children of Abraham, and therefore of a wicked, violent, and cruel disposition. In these circumstances David turned to God as His only Helper.