8 Bible Verses about Fractions, One Third

David sent forth a third of the troops {under the command of Joab}, and a third {under the command of Abishai}, the brother of Joab, the son of Zeruiah, and the remaining third {under the command of Ittai} the Gittite. And the king said to the troops, "I, even I, {will certainly go out} with you."

He commanded them, saying, "This [is] the thing which you must do: one third of you {who go off duty on the Sabbath}, the keepers of the guard in the house of the king, and another third at the gate of Sur, and a third at the gate behind the runners, shall guard the post of the palace alternately.

This is the thing that you must do: one third of you priests and Levites {coming off duty on the Sabbath} [shall be] gatekeepers at the entrances and one third at the house of the king, and one third at the Gate of the Foundation. And all the people [shall be] in the courtyards of the house of Yahweh.

By these three plagues a third of humanity was killed--by the fire and the smoke and the sulphur that came out of their mouths.

A third you must burn with fire in the midst of the city at {the completion} of the days of the siege, and you must take a third, and you must strike [it] with the sword around it, and a third you must scatter to the wind, and I will draw a sword behind them. And you must take from these a few in number, and you must tuck them in your hem. And from them again you shall take [some], and you must throw them in the middle of the fire, and you must burn them with fire; from it a fire will go out to all of the house of Israel.read more.
Thus says the Lord Yahweh: This [is] Jerusalem in the midst of the nations [where] I have put her, and countries [are] around her. But she has rebelled against my regulations to the point of wickedness more than the nations, and my statutes more than the countries that [are] around her; for they rejected my regulations, and [as for] my statutes, they did not walk in them. Therefore, thus says the Lord Yahweh: Because of your commotion more than the nations that [are] around you--you did not walk in my statutes, and you did not do my regulations, and according to the regulations of the nations that [are] around you, you did not do. Therefore thus says the Lord Yahweh: Look! I, {even I}, am against you, and I will execute judgment in the midst of you before the eyes of the nations, and I will do with you [that] which I have not done, and which I will not do again, because of all of your detestable things. Therefore parents will eat children in the midst of you, and children will eat their parents, and I will execute judgment in you, and I will scatter your entire remnant to every wind. Therefore {as surely as I live}, {declares} the Lord Yahweh, {Surely} because you have defiled my sanctuary with all of your vile idols and with all of your detestable things, {now indeed I} will reduce, and my eye will not take pity, and surely I will show no compassion. A third of you will die because of the plague, and because of the famine they will perish in the midst of you, and a third will fall through the sword around you, and a third I will scatter to every direction of the wind, and I will draw [the] sword behind them.

And the first blew the trumpet, and there was hail and fire mixed with blood, and it was thrown to the earth, and a third of the earth was burned up, and a third of the trees were burned up, and all the green grass was burned up. And the second angel blew the trumpet, and [something] like a great mountain burning with fire was thrown into the sea, and a third of the sea became blood, and a third of the creatures in the sea--the ones which had life--died, and a third of the ships were destroyed.read more.
And the third angel blew the trumpet, and a great star burning like a torch fell from heaven, and it fell on a third of the rivers and on the springs of water. And the name of the star was called Wormwood, and a third of the waters became wormwood, and many people died from the waters because they were made bitter. And the fourth angel blew the trumpet, and a third of the sun was struck, and a third of the moon, and a third of the stars, so that a third of them were darkened, and the day did not shine [with respect to] a third of it, and the night likewise.

And the four angels who had been prepared for the hour and day and month and year were released, in order that they should kill a third of humanity.

And his tail swept away a third of the stars from heaven and threw them to the earth. And the dragon stood before the woman who was about to give birth, in order that whenever she gave birth to her child he could devour [it].