'Bitterness' in the Bible

Samuel said, “Bring me Agag king of Amalek.”Agag came to him trembling, for he thought, “Certainly the bitterness of death has come.”

Then Abner called out to Joab: “Must the sword devour forever? Don’t you realize this will only end in bitterness? How long before you tell the troops to stop pursuing their brothers?”

Therefore I will not restrain my mouth.I will speak in the anguish of my spirit;I will complain in the bitterness of my soul.

I am disgusted with my life.I will express my complaintand speak in the bitterness of my soul.

The heart knows its own bitterness,and no outsider shares in its joy.

A foolish son is grief to his fatherand bitterness to the one who bore him.

What can I say?He has spoken to me,and He Himself has done it.I walk along slowly all my yearsbecause of the bitterness of my soul,

Indeed, it was for my own welfarethat I had such great bitterness;but Your love has delivered mefrom the Pit of destruction,for You have thrown all my sins behind Your back.

He has laid siege against me,encircling me with bitterness and hardship.

He filled me with bitterness,satiated me with wormwood.

So the Spirit lifted me up and took me away. I left in bitterness and in an angry spirit, and the Lord’s hand was on me powerfully.

For I see you are poisoned by bitterness and bound by iniquity.”

Their mouth is full of cursing and bitterness.

All bitterness, anger and wrath, shouting and slander must be removed from you, along with all malice.

Make sure that no one falls short of the grace of God and that no root of bitterness springs up, causing trouble and by it, defiling many.