And sent forth a third part of the people under the hand of Joab, and a third part under the hand of Abisai the son of Sarvia Joab's brother, and a third part under the hand of Ethai, who was of Geth: and the king said to the people: I also will go forth with you.

and David sendeth the third of the people by the hand of Joab, and the third by the hand of Abishai, son of Zeruiah, brother of Joab, and the third by the hand of Ittai the Gittite, and the king saith unto the people, 'I certainly go out, I also, with you.'

And David sent the people out, a third of them under the orders of Joab, and a third under the orders of Abishai, son of Zeruiah, Joab's brother, and a third under Ittai the Gittite. And the king said to the people, And I myself will certainly go out with you.

And he placed a third part of the people under the hand of Joab, and a third part under the hand of Abishai, the son of Zeruiah, the brother of Joab, and a third part under the hand of Ittai, who was from Gath. And the king said to the people, "I, too, will go forth with you."

A third part - This seems to have been a favorite division with the Hebrew commanders (see Judges 7:16; Judges 9:43; 1-Samuel 11:11; 2-Kings 11:5-6) and with the Philistines also 1-Samuel 13:17.

And David sent forth a third part of the people under the hand of Joab,.... Very likely that which made the centre of the army, since Joab was the general of the army; though this distribution was made when David thought to have headed the army himself, and so made with respect to that:
and a third part under the hand of Abishai the son of Zeruiah, Joab's brother; who was next to Joab in the army, and fought with him against the Syrians and Ammonites, 2-Samuel 10:10,
and a third part under the hand of Ittai the Gittite; of whom see 2-Samuel 15:19; of these two parts consisted the right and left wings of the army:
and the king said unto the people; the soldiers, and particularly the officers:
I will surely go forth with you myself also; in which he seemed very resolute and peremptory; and this he proposed to do, not merely to animate the soldiers with his presence, and to show that he was willing to hazard his life with them, but chiefly for the sake of Absalom, to preserve his life, if possible.