'Bitter' in the Bible

The name of the star is Wormwood. One-third of the water turned into wormwood, and many people died from the water because it had turned bitter.

So I went to the angel and asked him to give me the small scroll. "Take it and eat it," he told me. "It will turn bitter in your stomach, but it will be as sweet as honey in your mouth."

So I took the small scroll from the angel's hand and ate it. It was as sweet as honey in my mouth, but when I had eaten it, it turned bitter in my stomach.