Zechariah 13:8-9

In the whole land,’ declares the LORD, ‘two-thirds will be struck down and perish; yet one-third will be left in it. This third I will put into the fire; I will refine them like silver and test them like gold. They will call on my name and I will answer them; I will say, “They are my people,” and they will say, “The LORD is our God.” ’