3 Bible Verses about Bitterness

and the name of the star was called Wormwood, and a third part of the waters became wormwood; and many men died of the waters, because they were become bitter.

And I went to the angel, and said to him, Give me the little book. And he said to me, Take it, and eat it up; and it shall embitter your stomach, but in your mouth it shall be as sweet as honey.