From Benjamin, the kinsmen of Saul: 3,000, most of whom had remained loyal to the house of Saul up to that time.
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
Benjamin . . . three thousand--This small number shows the unpopularity of the movement in this tribe; and, indeed, it is expressly stated that the mass of the population had, even after Ish-bosheth's death, anxiously endeavored to secure the crown in the family of Saul.