Zechariah 12:4

In that day, saith the LORD, I will smite every horse with astonishment, and his rider with madness: and I will open mine eyes upon the house of Judah, and will smite every horse of the people with blindness.

I will smite every horse with astonishment - the arm of attack especially formidable to Judah, who was unprovided with cavalry. So in the overthrow of Pharaoh (; , "The horse and his rider hath He (the Lord) thrown into the sea").

And I will open mine eyes upon the house of Judah - in order to watch over Judah's safety. Heretofore Yahweh seemed to have shut His eyes, as having no regard for her.

And will smite every horse of the people with blindness - so as to rush headlong on their own ruin (cf. Zechariah 14:12).