“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.” Zechariah 11:17 (KJB)

Some thoughts from John Wesley…

“The idol shepherd – To them that are but the images of shepherds. That leaveth – Casts off the care of the flock. The sword – Of the enemy, shall break his strength and be – fool his counsels. Dried up – They that have gifts which qualify them to do good, if they do it not, they will be taken away. They that should have been workmen, but were slothful, and would do nothing, will justly have their arm dried up. And they that should have been watchmen, but were drowsy, will justly have their eye blinded.”  JOHN WESLEY’S NOTES ON THE BIBLE for Zechariah 11:17

John Gills notes on Zechariah 11:17…

“Woe to the idol shepherd,…. Or, “the shepherd of nothing” (w); that is, no true shepherd, that is good for nothing, for an idol is nothing in the world, 1Co_8:4 and who is an idol himself, sits in the temple of God, and is worshipped as if he was God. 2Th_2:4 and is an encourager and defender of idolatry:

that leaveth the flock; has no regard to its spiritual concerns; does not feed it, but fleece it, and leaves it to the cruelty and avarice of his creatures under him:

the sword shall be upon his arm; with which he should feed the flock:

and upon his right eye; with which he should watch over it:

his arm shall be clean dried up; his power shall be taken away from him; the antichristian states, which supported him, shall withdraw from him; the ten kings shall hate the whore, strip her naked, eat her flesh, and burn her with fire, Rev_17:16,

and his right eye shall be utterly darkened; not only given up to judicial blindness, which has been always his case; but his kingdom shall be full of darkness, Rev_16:10 his hidden things of darkness shall be exposed; all his crafty schemes will be confounded; and all his wit, cunning, and subtlety, will cease; and everything desirable to him will be taken away from him. His “arm” may denote his secular power, which shall be taken away from him: and his “right eye” his knowledge of the Scriptures, judgment in controversies, and infallibility pretended to by him, which wilt cease, even in the opinion of men. Ben Melech interprets it the eye of his heart or mind; and so Aben Ezra.”  JOHN GILL’S EXPOSITION OF THE BIBLE