Matthew Poole and continuators on 1 Chronicles 12:18

18 Then the spirit came upon Amasal , who was chief of the captains, and he said, Thine are we, David, and on thy side, thou son of Jesse; peace, peace be unto thee, and peace be to thine helpers, for thy God helpeth thee . Then David received them: and made them captains of the band .

Not onely saving Graces, but other heroical and generous Motions are ascribed to Gods Spirit, which here stirred up in him a more than ordinary greatness and presentness of Mind and Resolution.

We have observed Gods singular and gracious Care of thee and Kindness to thee and if we should oppose thee, we should be Fighters against God and his Word and Providence.

i. e Of those Forces which they brought with them. Or, he put them among the heads or officers of his band; i. e. He gave them Commands either now in his small Army, each according to his Quality: or afterwards when he was advanced to the Kingdom: for it is not here expressed when he did this.

Marginal references: Heb. the spirit clothed Amasal. So Judg. 6. 34.