Mishkat al-Masabih
Mishkat al-Masabih 3533
عَنْ عِكْرِمَةَ قَالَ: أُتِيَ عَلِيٌّ بِزَنَادِقَةٍ فَأَحْرَقَهُمْ فَبَلَغَ ذَلِكَ ابْنَ عَبَّاسٍ فَقَالَ: لَوْ كُنْتُ أَنَا لَمْ أُحْرِقْهُمْ لِنَهْيِ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تُعَذِّبُوا بِعَذَابِ اللَّهِ» وَلَقَتَلْتُهُمْ لِقَوْلِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ بَدَّلَ دِينَهُ فَاقْتُلُوهُ» . رَوَاهُ الْبُخَارِيُّ
Ikrimah reported: Some heretics were brought to Ali, and he burned them. When this reached Ibn Abbas, he said: ‘Had it been me, I would not have burned them, because the Messenger of God forbade it with the words, Do not punish with God’s punishment. I would have killed them, because the Messenger of God said, Whoever changes his religion, kill him.’ Al-Bukhari transmitted it.