When is a Muslim not rewarded for suppressing anger?

The Noble Qur’an mentions suppressing anger and forgiving people as characteristics of the pious, and promises a great reward for those who forgive, stating that it is among the most resolute of matters. This is found in His, the Almighty’s, sayings: "And those who suppress anger, and pardon people," and "But whoever pardons and makes reconciliation – his reward is due from Allah." The Prophet (peace be upon him) also promised a reward on the Day of Judgment for whoever suppresses his anger.

However, suppressing anger becomes a sin in certain situations, including: - If a person is able to change an evil in which Allah’s sanctity is violated, then he must denounce it. - To leave an aggressor against oneself or one’s honor and overlook it is forbidden.