'Bitterness of My Soul' in the Bible

“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 loathe my own life;I will give full vent to my complaint;I will speak in the bitterness of my soul.

“What shall I say?For He has spoken to me, and He Himself has done it;I will wander about all my years because of the bitterness of my soul.