Here are 5 Bible verses about being slow to anger from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Titus 1:7 KJV
For a bishop must be blameless, as the steward of God; not selfwilled, not soon angry, not given to wine, no striker, not given to filthy lucre;
James 1:19 KJV
Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Proverbs 19:11 KJV
The discretion of a man deferreth his anger; and it is his glory to pass over a transgression.
Proverbs 16:32 KJV
He that is slow to anger is better than the mighty; and he that ruleth his spirit than he that taketh a city.
Proverbs 15:18 KJV
A wrathful man stirreth up strife: but he that is slow to anger appeaseth strife.