(1) باب الْحُكْمِ فِيمَنِ ارْتَدَّ
'Ikrimah said:
'Ali burned some people who retreated from Islam. When Ibn 'Abbas was informed of it, he said: If it had been I, I would not have burned them, for the Messenger of Allah (ﷺ) said: Do not inflict Allah's punishment on anyone, but would have had killed them on account of the statement of the Messenger of Allah (ﷺ). The Apostle said: Kill those who change their religion. When 'Ali was informed about it he said: How truly Ibn 'Abbas said!
Reference: Sunan Abi Dawud 4351
In-book reference: Book 40, Hadith 1
English translation: Book 39, Hadith 4337