Revelation 8:7-12

8:7 The first angel blew his trumpet, and there was hail and fire mixed with blood, and it was thrown at the earth so that a third of the earth was burned up, a third of the trees were burned up, and all the green grass was burned up.

8:8 Then the second angel blew his trumpet, and something like a great mountain of burning fire was thrown into the sea. A third of the sea became blood, 8:9 and a third of the creatures living in the sea died, and a third of the ships were completely destroyed.

8:10 Then the third angel blew his trumpet, and a huge star burning like a torch fell from the sky; it landed on a third of the rivers and on the springs of water. 8:11 (Now the name of the star is Wormwood.) So a third of the waters became wormwood, and many people died from these waters because they were poisoned.

8:12 Then the fourth angel blew his 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 there was no light for a third of the day and for a third of the night likewise.

Revelation 9:15

9:15 Then the four angels who had been prepared for this hour, day, month, and year were set free to kill a third of humanity.

Revelation 9:18

9:18 A third of humanity was killed by these three plagues, that is, by the fire, the smoke, and the sulfur that came out of their mouths.

Revelation 12:4

12:4 Now the dragon’s tail swept away a third of the stars in heaven and hurled them to the earth. Then the dragon stood before the woman who was about to give birth, so that he might devour her child as soon as it was born.