'Regret' in the Bible

“I regret that I have made Saul king, for he has turned back from following Me and has not carried out My commands.” And Samuel was distressed and cried out to the Lord all night.

He was thirty-two years old when he became king, and he reigned in Jerusalem eight years; and he departed with no one’s regret, and they buried him in the city of David, but not in the tombs of the kings.

For though I caused you sorrow by my letter, I do not regret it; though I did regret it—for I see that that letter caused you sorrow, though only for a while—

For the sorrow that is according to the will of God produces a repentance without regret, leading to salvation, but the sorrow of the world produces death.