Psalm 37:8

"Refrain from anger, and forsake wrath! Fret not yourself; it tends only to evil."

Anger, wrath, and worrying are all closely related. When something doesn't go our way, we begin to fret about all the work we put into it or about the consequences; anger often follows. Here, Scripture provides a rare insight into the consequences of worrying. Anxiety is often pointed to as a lack of trust in God; this is implied from other passages. This verse actually states that it normally leads to evil. All this is just more reason to wait on God.

Peace.