Passage
Behold, the LORD will cast her out, and he will smite her power in the sea; and she shall be devoured with fire.
Zechariah 9:4 (KJV)
Nearby Context
Zechariah 9:2 And Hamath also shall border thereby; Tyrus, and Zidon, though it be very wise.
Zechariah 9:3 And Tyrus did build herself a strong hold, and heaped up silver as the dust, and fine gold as the mire of the streets.
Zechariah 9:4 Behold, the LORD will cast her out, and he will smite her power in the sea; and she shall be devoured with fire.
Zechariah 9:5 Ashkelon shall see it, and fear; Gaza also shall see it, and be very sorrowful, and Ekron; for her expectation shall be ashamed; and the king shall perish from Gaza, and Ashkelon shall not be inhabited.
Zechariah 9:6 And a bastard shall dwell in Ashdod, and I will cut off the pride of the Philistines.
Study Lenses
The verse centers on "behold", "lord", "cast", "smite", "power", "shall", "devoured", and "fire". It is saying that the verse draws attention to "behold" and "lord", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 3's "And Tyrus did build herself a strong..." into verse 5's "Ashkelon shall see it and fear Gaza...", so "behold" and "lord" belong inside that flow. In Zechariah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "behold" and "lord" with trust shaped by these words, not by a vague optimism outside the passage.