Hazrat Abu Musa (may Allah be pleased with him) narrates that Hazrat Ali (may Allah be pleased with him) reminded us of the prayer of the Noble Prophet (peace and blessings be upon him) which we used to perform with the Noble Prophet (peace and blessings be upon him), but which we had forgotten or deliberately abandoned. He used to say "Allahu Akbar" every time he bowed (for ruku‘), when rising from bowing, and when going into prostration (sajdah).