[Machine] The Messenger of Allah ﷺ said, "Who is this man?" They said, "It is 'Ammaar ibn Yaasir." He said, "Do you remember the day when the Messenger of Allah ﷺ was building the mosque, and we were carrying bricks one by one, and 'Ammaar was carrying two bricks at a time? And then the Messenger of Allah ﷺ passed by while 'Ammaar was carrying two bricks, and you were there as well. The Messenger of Allah ﷺ said to him, 'Verily, the rebellious group will kill you, while you will be among the people of Paradise.' Then 'Umar went to Mu'aawiyah and said, 'We have killed this man, although the Messenger of Allah ﷺ said something about him that we shouldn't have ignored.' Mu'aawiyah told him to be quiet and said, 'By Allah, you'll keep boasting about it until you die, but we were the ones who killed him. It was only 'Ali and his companions who brought him until they handed him over to us.'" And this is how you see the mistake.  

قَالَ رَسُولُ اللَّهِ ﷺ فِيهِ مَا قَالَ قَالَ أَيُّ الرَّجُلِ؟ قَالَ عَمَّارُ بْنُ يَاسِرٍ أَمَا تَذْكُرُ يَوْمَ بَنَى رَسُولُ اللَّهِ ﷺ الْمَسْجِدَ فَكُنَّا نَحْمِلُ لَبِنَةً لَبِنَةً وَعَمَّارٌ يَحْمِلُ لَبِنَتَيْنِ لَبِنَتَيْنِ فَمَرَّ عَلَى رَسُولِ اللَّهِ ﷺ يَحْمِلُ لَبِنَتَيْنِ لَبِنَتَيْنِ وَأَنْتَ مِمَّنْ حَضَرَ قَالَ «أَمَا إِنَّكَ سَتَقْتُلُكَ الْفِئَةُ الْبَاغِيَةُ وَأَنْتَ أَهْلُ الْجَنَّةِ» فَدَخَلَ عَمْرٌو عَلَى مُعَاوِيَةَ فَقَالَ قَتَلْنَا هَذَا الرَّجُلَ وَقَدْ قَالَ فِيهِ رَسُولُ اللَّهِ ﷺ مَا قَالَ فَقَالَ اسْكُتْ فَوَاللَّهِ مَا تَزَالُ تَرْحَضُ فِي بَوْلِكَ أَنَحْنُ قَتَلْنَاهُ إِنَّمَا قَتَلَهُ عَلِيٌّ وَأَصْحَابُهُ جَاءُوا بِهِ حَتَّى أَلْقَوْهُ بَيْنَنَاهو كما ترى خطأ