2 Samuel 15:19

17And the king went forth, and all the people after him, and tarried in a place that was far off.

18And all his servants passed on beside him; and all the Cherethites, and all the Pelethites, and all the Gittites, six hundred men which came after him from Gath, passed on before the king.

19Then 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.

20Whereas thou camest but yesterday, should I this day make thee go up and down with us? seeing I go whither I may, return thou, and take back thy brethren: mercy and truth be with thee.

21And Ittai answered the king, and said, As the LORD liveth, and as my lord the king liveth, surely in what place my lord the king shall be, whether in death or life, even there also will thy servant be.