'Third' in the Bible

the third chariot white horses, and the fourth chariot dappled horses—all strong horses.

In the whole land—this is the Lord’s declaration—two-thirds will be cut off and die,but a third will be left in it.

I will put this third through the fire;I will refine them as silver is refinedand test them as gold is tested.They will call on My name,and I will answer them.I will say: They are My people,and they will say: Yahweh is our God.”