Hakeem al-Ummah Maulana Ashraf Ali Thanwi (ra) said:

When angered by someone, leave his presence or have him removed from your presence and drink cold water. If the anger is overwhelming, then reflect:

” Allah ta’ala has rights over me and I frequently violate such rights. When he forgives us, we too should forgive the faults and errors of others. What would be my plight if He seeks to take vengeance?”