Adam Clarke on Isaiah 42:1

Behold my servant, whom I uphold - אתמך בו ethmach bo, on whom I lean. Alluding to the custom of kings leaning on the arm of their most beloved and faithful servant. All, both Jews and Christians, agree, that the seven first verses of this chapter belong to Christ. Now, as they are evidently a continuation of the prophecy in the preceding chapter, that prophecy cannot belong to Cyrus, but to Christ.

He shall bring forth judgment to the Gentiles "He shall publish judgment to the nations" - Four MSS. two ancient, add the conjunction ומשפט vemishpat. See Mat 12:18.

The word משפט mishpat, judgment, like צדקה tsedakah, righteousness, is taken in a great latitude of signification. It means rule, form, order, model, plan; rule of right, or of religion; an ordinance, institution; judicial process, cause, trial, sentence, condemnation, acquittal, deliverance, mercy, etc. It certainly means in this place the law to be published by Messiah, the institution of the Gospel.