Sahl bin Mu'adh (may Allah have mercy on him) reports from his father (Sayyiduna Mu'adh bin Anas (may Allah be pleased with him)), who reports from the Prophet (peace and blessings be upon him): "Whoever controls his anger despite having the power (to act on it), Allah will call him on the Day of Resurrection before all the people, so that he may choose for himself whichever of the hur he wishes."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16645