This is the Benaiah who was a mighty man of the thirty and in command of the thirty; Ammizabad his son was in charge of his division.
We have here an account of the regulation of the militia of the kingdom. David was himself a man of war, and had done great things with the sword; he had brought into the field great armies. Now here we are told how he marshalled them when God had given him rest from all his enemies.
Commenting on 1 Chronicles 27:1-15
1Ch 27:5-6 Here the form of expression is changed; הצּבא שׂר, the chief of the third host, begins the sentence. As to Benaiah, see 1Ch 11:22 and the commentary on 2Sa 23:20. ראשׁ does not belong to הכּהן, but is the predicate of Benaiah: “the prince of the ... was Benaiah ... as head,” sc. of the division for the third month.
Commenting on 1 Chronicles 27:5-6