I looked this up last night in response to a situation that had me flustered.
Be still before the LORD and wait patiently for him;
do not fret when men succeed in their ways,
when they carry out their wicked schemes.
Refrain from anger and turn from wrath;
do not fret—it leads only to evil.
For evil men will be cut off,
but those who hope in the LORD will inherit the land.