It is narrated from Hazrat Abu Saeed (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) ordered us to build the mosque. We would each carry one brick, while Hazrat Ammar (may Allah be pleased with him) would carry two bricks, and his head was covered in dust. My companions related to me, although I did not hear this directly from the Prophet (peace and blessings be upon him), that the Prophet (peace and blessings be upon him) would dust off his head and say: "O son of Sumayyah! Alas, a rebellious group will martyr you."