21:68Al-Anbiyaa

'Ali came to some people of Az-Zutt, who worshipped idols, and burned them. Ibn 'Abbas said: "But the Messenger of Allah said: 'Whoever changes his religion, kill him.'"

Allah's Messenger (ﷺ) sent us in a mission (i.e., an army-unit) and said, "If you find so-and-so and so-and-so, burn both of them with fire." When we intended to depart, Allah's Messenger (ﷺ) said, "I have ordered you to burn so-and-so and so-and-so, and it is none but Allah Who punishes with fire, so, if you find them, kill them (i.e., don't burn them)."

"The Messenger of Allah (ﷺ) sent us with an army and said: 'If you see so-and-so, and so-and-so' referring to two men from the Quraish: 'then burn them with fire.' Then, upon our departure, the Messenger of Allah (ﷺ) said: 'I ordered you to burn so-and-so, and so-and-so with fire, and indeed, none punishes with fire except Allah. So if you see them, then kill them.'" There are narrations on this topic from Ibn 'Abbas and Hamzah bin 'Amr Al-Aslami. The Hadith of Abu Hurairah is a Hasan Sahih Hadith. This is acted upon according to the people of knowledge. In this Hadith, Muhammad bin Ishaq mentioned a man (narrating) between Sulaiman bin Yasar and Abu Hurairah. Others reported this Hadith the same as Al-Laith reported it(here, without a man between them). The narration of Al-Laith bin Sa'd is more appropriate and more correct.

He came to the Prophet got angry and said: "Go and take them off." He said: "Where should I throw them, O Messenger of Allah?" He said: "In the fire."

"Some people apostatized after accepting Islam, and 'Ali burned them with fire. Ibn 'Abbas said: 'If it had been me, I would not have burned them; the Messenger of Allah said: 'Whoever changes his religion, kill him.'"