It is narrated from Hazrat Zain ul Abideen, whose blessed name is Ali and he is the son of Sayyiduna Husain bin Ali bin Abi Talib (may Allah be pleased with them), that the Messenger of Allah (peace and blessings be upon him) used to say the takbeer in prayer when bowing and when rising, and his prayer always remained in this manner, until he met Allah, Glorious is His Majesty.