an host. Hebrew "power". Figure of speech Metonymy (of Adjunct), App-6, put for the army which manifested the power. Or, it may be rendered "he wrought mightily".
Related Commentaries of 1 Samuel 14:48
1 Samuel 14:48
48 And he gatheredl an host, and smote the Amalekites, and delivered Israel out of the hands of them that spoiled them.