King James Version (KJV)
He teacheth my hands to war; so that a bow of steel is broken by mine arms. {to war: Heb. for the war}
Modern English
He teaches my hands to war, so that my arms bend a bow of brass.
Hebrew
מְלַמֵּ֥ד יָדַ֖י לַמִּלְחָמָ֑ה וְנִחַ֥ת קֶֽשֶׁת־נְחוּשָׁ֖ה זְרֹעֹתָֽי׃
mlamed yaday lamilḥamah vniḥat qeshet-nḥvshah zroʿotay