2 Samuel 15:18-22

18Then all his servants passed before him; and all the Cherethites, all the Pelethites, and all the Gittites, six hundred men who had followed him from Gath, passed before the king.

19Then the king said to Ittai the Gittite, “Why are you also going with us? Return and remain with the king. For you are a foreigner and also an exile from your own place.

20In fact, you came only yesterday. Should I make you wander up and down with us today, since I go I know not where? Return, and take your brethren back. Mercy and truth be with you.”

21But Ittai answered the king and said, “As the Lord lives, and as my lord the king lives, surely in whatever place my lord the king shall be, whether in death or life, even there also your servant will be.”

22So David said to Ittai, “Go, and cross over.” Then Ittai the Gittite and all his men and all the little ones who were with him crossed over.