'Mourning' in the Bible

Thou hast turned for me my mourning into dancing; Thou hast loosed my sackcloth, and girded me with gladness;

I behaved myself as though it had been my friend or my brother: I bowed down mourning, as one that bewaileth his mother.

I am pained and bowed down greatly; I go mourning all the day long.

I will say unto God my rock, Why hast thou forgotten me? Why go I mourning because of the oppression of the enemy?

For thou art the God of my strength; why hast thou cast me off? Why go I mourning because of the oppression of the enemy?