James 1:19 “Let every man be swift to hear and slow to speak and slow to become angry”. Some of us are temperamental and easily get angry and upset but we have to be careful, hence the bible teaches us to be slow to anger because James 1:20 advises that “human anger does not produce the righteousness that God desires”.
Ecclesiastes 7: 9 “Do not be quickly provoked in your spirit, for anger resides in the lap of fools”
Ephesians 4:26 “In your anger do not sin”[d]: Do not let the sun go down while you are still angry”