'Third' in the Bible

and in the third chariot white horses, and in the fourth chariot strong grisled horses.

And it hath come to pass, In all the land, an affirmation of Jehovah, Two parts in it are cut off -- they expire, And the third is left in it.

And I have brought the third into fire, And refined them like a refining of silver, And have tried them like a trying of gold, It doth call in My name, and I answer it, I have said, 'My people it is,' And it saith, 'Jehovah is my God!'