Zechariah 13:8-9

8And it shall come to pass in all the land,” Says the Lord, “That two-thirds in it shall be cut off and die, But one–third shall be left in it:

9I will bring the one–third through the fire, Will refine them as silver is refined, And test them as gold is tested. They will call on My name, And I will answer them. I will say, ‘This is My people’; And each one will say, ‘The Lord is my God.’ ”