Albert Barnes Commentary Zechariah 9:16

"And Jehovah their God will save them in that day as the flock of his people; for [they shall be as] the stones of a crown, lifted on high over his land." — Zechariah 9:16 (ASV)

And the Lord their God shall save them in that day – Still, it will all be God’s doing. They themselves were only like a flock, like sheep among wolves, ready for slaughter. But they were “the flock, His people,” as He says, I will increase them like the flock, men, as the flock of holy things, as the flock of Jerusalem in her solemn feasts; so shall the waste cities be filled with flocks, men (Ezekiel 36:37–38).

As a man saves his flock with all his strength, so He will save His people, for they are His flock. As in, You led Your people like sheep by the hand of Moses and Aaron (Psalms 77:20).

They shall be as the stones of a crown – While God’s enemies will be trampled underfoot, as a common thing that has failed its end, these shall be precious stones; a consecrated diadem of king or priest, raised aloft, so that all can see. On His land. It was laid down, as the title deed to its whole tenure, the land is Mine (Leviticus 25:23), and much more our Christian land, bought and purified by the blood of Christ.