2 Samuel 15:19-20

19Then said the king to Ittai the Gittite, Why goest thou also with us? return to thy place, and abide with the king: for thou art a stranger, and also an exile. 20Though thou camest but yesterday, should I this day make thee go up and down with us? seeing I go wherever I may, return thou, and take back thy brethren: mercy and truth be with thee.1