Hazrat Imran bin Husain (may Allah be pleased with him) says that once I prayed behind Hazrat Ali (may Allah be pleased with him), and after offering that prayer, I remembered the prayer of the Prophet (peace and blessings be upon him) and the two Shaykhs. The narrator says that I went along with him and prayed behind Hazrat Ali (may Allah be pleased with him). He used to say "Allahu Akbar" every time he went into prostration and every time he raised his head. When the prayer was finished, I asked Hazrat Imran (may Allah be pleased with him), "O Abu Nujayd! Who was the first to abandon this?" He replied, "Hazrat Uthman (may Allah be pleased with him), when he became old and his voice became weak."