“Were it not for a word that I heard from 'Amr bin Hamiq Khuza'i, I would have separated the head of Al-Mukhtar from his body. I heard him saying: “The Messenger of Allah ﷺ said: 'If a man trusts someone with his life then he kills him, he will carry a banner of treachery on the day of Resurrection.'”  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ أَمِنَ رَجُلاً عَلَى دَمِهِ فَقَتَلَهُ فَإِنَّهُ يَحْمِلُ لِوَاءَ غَدْرٍ يَوْمَ الْقِيَامَةِ  

“I entered upon Mukhtar in his palace and he said: 'Jibril has just left me.' Nothing stopped me from striking his neck (i.e, killing him) but a Hadith that I heard from Sulaiman bin Surad, according to which the Prophet ﷺ said: 'If a man trusts you with his life, then do not kill him.' That is what stopped me.”  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ إِذَا أَمِنَكَ الرَّجُلُ عَلَى دَمِهِ فَلاَ تَقْتُلْهُ فَذَاكَ الَّذِي مَنَعَنِي مِنْهُ