Charles Spurgeon Commentary 2 Samuel 15:19-23

"Then said the king to Ittai the Gittite, Wherefore goest thou also with us? return, and abide with the king: for thou art a foreigner, and also an exile; [return] to thine own place. Whereas 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. And Ittai answered the king, and said, As Jehovah liveth, and as my lord the king liveth, surely in what place my lord the king shall be, whether for death or for life, even there also will thy servant be. And David said to Ittai, Go and pass over. And Ittai the Gittite passed over, and all his men, and all the little ones that were with him. And all the country wept with a loud voice, and all the people passed over: the king also himself passed over the brook Kidron, and all the people passed over, toward the way of the wilderness." — 2 Samuel 15:19-23 (ASV)

Then 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. Whereas 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. And 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. And David said to Ittai, Go and pass over.

And Ittai the Gittite passed over, and all his men, and all the little ones that were with him. And all the country wept with a loud voice, and all the people passed over; the king also himself passed over the brook Kidron, and all the people passed over, toward the way of the wilderness.

A fitting type of that future passage of the Kidron by the great son of David, when on that dark and doleful night, when all the powers of darkness met, the Prince – the King himself – passed over that black and bitter brook into the garden of Gethsemane. There were faithful ones that went with David: there were some faithful ones with Christ. Happy are they who shall be found to be with their Lord and Master in the day of his sorrow, for they shall be with him in the day of his joy.