Revelation 8:11

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.

Hebrews 12:15

taking care, lest any one slight the grace of God; lest any root of bitterness spring up and trouble you, and by this many be defiled;

Revelation 8:7

And the first angel sounded; and there were hail and fire mingled with blood, and they were thrown into the earth: and the third part of the earth was burned up, and the third part of the trees was 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
taking care, lest any one slight the grace of God; lest any root of bitterness spring up and trouble you, and by this many be defiled;