Anas (RAA) narrated that the Messenger of Allah (ﷺ) said:
"If one restrained his anger, Allah will keep His punishment from him (on the Day of Resurrection)." Related by At-Tabarani in al-Awsat. (DE)
English reference (DE): Book 16, Hadith 1549 (DE)
Arabic reference (DE): Book 16, Hadith 1506 (DE)