Zechariah 13:7-9

7“Awake, sword, against my shepherd, against the man who is my associate,” says the Lord who rules over all. Strike the shepherd that the flock may be scattered; I will turn my hand against the insignificant ones.

8It will happen in all the land, says the Lord, that two-thirds of the people in it will be cut off and die, but one-third will be left in it.

9Then I will bring the remaining third into the fire; I will refine them like silver is refined and will test them like gold is tested. They will call on my name and I will answer; I will say, ‘These are my people,’ and they will say, ‘The Lord is my God.’”