'Painful' in the Bible

In fact, I made up my mind about this: I would not come to you on another painful visit.

No discipline seems enjoyable at the time, but painful. Later on, however, it yields the fruit of peace and righteousness to those who have been trained by it.

The first went and poured out his bowl on the earth, and severely painful sores broke out on the people who had the mark of the beast and who worshiped his image.