2 Samuel 15:18-22

Now all of his servants passed by beside him, and all the Cherethites, all the Pelethites, and all the Gittites, six hundred men who had come with him from Gath, passed by before the king.

Then the king said to Ittai the Gittite, “Why should you go with us too? Return and stay with your king, since you are a foreigner and an exile as well; return to your own place.

You came only yesterday, so should I make you wander with us today, while I go wherever I go? Return and take your brothers back; mercy and truth be with you.”

But Ittai answered the king and said, “As the Lord lives, and as my lord the king lives, wherever my lord the king may be, whether for death or for life, there assuredly shall your servant be!”

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