'Mourning' in the Bible

You have turned my mourning into dancing for me;You have taken off my sackcloth and clothed me with joy,

I am bent over and greatly bowed down;I go about mourning all day long.

I will say to God my rock, “Why have You forgotten me?Why do I go mourning because of the oppression of the enemy?”

For You are the God of my strength [my stronghold—in whom I take refuge]; why have You rejected me?Why do I go mourning because of the oppression of the enemy?

I am sleepless and lie awake [mourning],I have become like a lonely bird on a housetop.