Revelation 8:11

The name of the star is Wormwood. A third of the waters became Wormwood, and many men died from the waters, because they were made bitter.

Hebrews 12:15

See to it that no one comes short of the grace of God; that no root of bitterness spring up and cause trouble, and by it many become defiled;

Revelation 8:7

The first angel sounded his trumpet, and there came hail and fire, mixed with blood, and they were 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.

Treasury of Scripture Knowledge

Summary

And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.

Wormwood

Bible References

Wormwood

Hebrews 12:15
See to it that no one comes short of the grace of God; that no root of bitterness spring up and cause trouble, and by it many become defiled;