Revelation 8:11

The star is called Apsinthus, that is, Wormwood. Then one third of the waters turned to wormwood, and numbers of people died of the waters, for they had turned bitter.

Hebrews 12:15

Be careful that no one fails to gain God's favor, or some poisonous root may come up to trouble and contaminate you all??16 some immoral or godless person like Esau, who sold his very birthright for one single meal.

Revelation 8:7

The first blew his trumpet, and there was a storm of hail and fire mixed with blood, and it fell upon the earth, and one third of the earth was burned up, and one 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
Be careful that no one fails to gain God's favor, or some poisonous root may come up to trouble and contaminate you all??16 some immoral or godless person like Esau, who sold his very birthright for one single meal.