Rashi on Isaiah
Instead of the briar, etc. Our Rabbis expounded [Targum Jonathan]: Instead of the wicked, righteous people shall arise.
Ibn Ezra on Isaiah
הנעצוץ The thorn. Comp. הנעצוצים the thorns (7:19). The fir is undoubtedly better than the thorn.
Rashi on Isaiah
briar...and...nettle They are species of thorns; i.e., to say that the wicked will be destroyed and the righteous will take their rule.