Woe to the idol shepherd that leaveth the flock! the sword shall be upon his arm, and upon his right eye: his arm shall be clean dried up, and his right eye shall be utterly darkened. Wo to the idol shepherd - רעי האליל roi haelil, "the worthless," or "good for nothing shepherd." The shepherd in name and office, but not performing the work of one. See John 10:11.
The sword shall be upon his arm - Punishment shall be executed upon the wicked Jews, and especially their wicked kings and priests. See Zephaniah 11:16.
Arm - the secular power; right eye - the ecclesiastical state.
His arm shall be clean dried up - The secular power shall be broken, and become utterly inefficient.
His right eye shall be utterly darkened - Prophecy shall be restrained; and the whole state, ecclesiastical and civil, shall be so completely eclipsed, that none of their functions shall be performed. This may refer to the worthless and wicked governor mentioned in the preceding verse.
There are several things in this chapter that are very obscure, and we can hardly say what opinion is right; nor is it at all clear whether they refer to a very early or late period of the Jewish history.
Commentary on the Bible, by Adam Clarke [1831].