'Bitterness of My Soul' in the Bible

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

My soul was weary in my life; I shall leave upon me my complaint; I shall speak in the bitterness of my soul

What shall I speak? and he said to me, and he did: I shall go slowly all my years upon the bitterness of my soul.