All these, men of war, arrayed in battle order, came to Hebron with a whole heart to make David king over all Israel. Likewise, all the rest of Israel were of a single mind to make David king.
We have here an account of those who were active in perfecting the settlement of David upon the throne, after the death of Ishbosheth. We read (Ch1 11:1, and before Sa2 5:1) that all the tribes of Israel came, either themselves or by their representatives, to Hebron, to make David king; now here we have an account of the quota which every tribe brought in...
Commenting on 1 Chronicles 12:23-40
THE ARMIES THAT CAME TO HIM AT HEBRON. (1Ch. 12:23-40) these are the numbers of the bands . . . that came to David to Hebron--after the death of Ish-bosheth (see on Sa2 5:1). to turn the kingdom of Saul to him, according to the word of the Lord-- (Ch1 10:14; Ch1 11:3, Ch1 11:10).
Commenting on 1 Chronicles 12:23-40
all the rest also of Israel were of one heart to make David king--that is, entertained a unanimous desire for his elevation.