וּלְר֖וּחַ מִשְׁפָּ֑ט לַיּוֹשֵׁב֙ עַל־הַמִּשְׁפָּ֔ט וְלִ֨גְבוּרָ֔ה מְשִׁיבֵ֥י מִלְחָמָ֖ה שָֽׁעְרָה׃ (ס)
Rashi on Isaiah
And for a spirit of justice will the Holy One, blessed be He, be, i.e., to teach justice, to him who sits in judgment.
Ibn Ezra on Isaiah
To him that sitteth in judgment. To the judges. God will strengthen them. אל השער ═ שערה.
Rashi on Isaiah
and for might will He be for those who bring back the war, the war of Torah.