[Machine] The Prophet ﷺ commanded us to build the mosque, so we started carrying one brick after another. 'Ammaar carried two bricks at a time, and the dust fell on his head. He said, "My companions told me about it, and I did not hear it from the Prophet ﷺ, that he used to shake off the dust from his head and say, 'Woe to you, son of Sumayyah, you will be killed by the rebellious group.'"  

أَمَرَنَا رَسُولُ اللهِ ﷺ بِبِنَاءِ الْمَسْجِدِ فَجَعَلْنَا نَنْقُلُ لَبِنَةً لَبِنَةً وَكَانَ عَمَّارٌ يَنْقُلُ لَبِنَتَيْنِ لَبِنَتَيْنِ فَتَتَرَّبُ رَأْسُهُ قَالَ فَحَدَّثَنِي أَصْحَابِي وَلَمْ أَسْمَعْهُ مِنْ رَسُولِ اللهِ ﷺ أَنَّهُ جَعَلَ يَنْفُضُ رَأْسَهُ وَيَقُولُ وَيْحَكَ يَا ابْنَ سُمَيَّةَ تَقْتُلُكَ الْفِئَةُ الْبَاغِيَةُ