8 Bible Verses about Fractions, One Third

Then David sent the army out, a third under the command of Joab, a third under Abishai the son of Zeruiah, Joab’s brother, and a third under the command of Ittai the Gittite. And the king said to the men, “I myself will certainly go out [to fight] with you.”

He commanded them, saying, “This is the thing that you shall do: a third of you who come in [reporting for duty] on the Sabbath shall keep watch over the king’s house (a third shall also be at the [city] gate Sur, and a third at the gate behind the guards); so you shall keep watch over the palace [from three posts] for defense.

This is what you shall do: a third of you, of the priests and Levites who are resuming service on the Sabbath, shall be gatekeepers, a [second] third shall be at the king’s house (palace), and a [final] third at the Gate of the Foundation; and all the people shall be in the courtyards of the house of the Lord.

A third of mankind was killed by these three plagues—by the fire and the smoke and the brimstone that came from the mouths of the horses.

You shall burn one third with fire in the center of the city, when the days of the siege are completed. Then you shall take one third and strike it with the sword all around the city, and one third you shall scatter to the wind; and I will unsheathe a sword behind them. Also take some of them and bind them in the edges of your robes. Again take some hair and throw them into the fire and burn them in the fire; from it a fire will spread to all the house of Israel. read more.
“Thus says the Lord God, ‘This is Jerusalem; I have set her in the center of the nations, and countries are around her. And she has rebelled against My ordinances more wickedly than the [pagan] nations and against My statutes more than the countries that are around her; for Israel has rejected My ordinances and has not walked in My statutes.’ Therefore, thus says the Lord God, ‘Because you have more turmoil than the nations which surround you and have not walked in My statutes, nor kept My ordinances, nor observed the ordinances of the nations which surround you,’ therefore, thus says the Lord God, ‘Behold, I, I Myself, am against you, and I will execute judgments among you in the sight of the nations. And because of all your abominations, I will do among you that which I have not done, and the like of which I will not do again. Therefore, fathers will eat their sons among you, and sons will eat their fathers; and I will execute judgments on you and I will scatter to all the winds the remnant of you. So, as I live,’ says the Lord God, ‘surely, because you have defiled My sanctuary with all your detestable idols and with all your abominations, therefore I will also diminish you and withdraw, and My eye will have no pity and I will not spare [you]. One third of you will die of virulent disease or be consumed by famine among you; one third will fall by the sword around you; and one third I will scatter to all the winds, and I will unsheathe a sword behind them.

The first [angel] sounded [his trumpet], and there was [a storm of] hail and fire, mixed with blood, and it was hurled 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. The second angel sounded [his trumpet], and something like a great mountain blazing with fire was hurled into the sea; and a third of the sea was turned to blood; and a third of the living creatures that were in the sea died, and a third of the ships were destroyed. read more.
The third angel sounded [his trumpet], and a great star fell from heaven, burning like a torch [flashing across the sky], and it fell on a third of the rivers and on the springs of [fresh] waters. The name of the star is Wormwood; and a third of the waters became wormwood, and many people died from the waters, because they had become bitter (toxic). Then the fourth angel sounded [his trumpet], and a third of the sun and a third of the moon and a third of the stars were struck, so that a third of them would be darkened and a third of the daylight would not shine, and the night in the same way [would not shine].

So the four angels, who had been prepared for the [appointed] hour and day and month and year, were released to kill a third of mankind.

And his tail swept [across the sky] and dragged away a third of the stars of heaven and flung them to the earth. And the dragon stood in front of the woman who was about to give birth, so that when she gave birth he might devour her child.