Sahih Bukhari · Hadith 3017

حدثنا علي بن عبد الله، حدثنا سفيان، عن أيوب، عن عكرمة، أن عليا رضى الله عنه حرق قوما، فبلغ ابن عباس فقال لو كنت أنا لم أحرقهم، لأن النبي صلى الله عليه وسلم قال ‏"‏ لا تعذبوا بعذاب الله ‏"‏‏.‏ ولقتلتهم كما قال النبي صلى الله عليه وسلم ‏"‏ من بدل دينه فاقتلوه ‏"‏‏.‏

Narrated `Ikrima: `Ali burnt some people and this news reached Ibn `Abbas, who said, "Had I been in his place I would not have burnt them, as the Prophet said, 'Don't punish (anybody) with Allah's Punishment.' No doubt, I would have killed them, for the Prophet said, 'If somebody (a Muslim) discards his religion, kill him.' "

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).