Narrated from Sayyiduna Abu Huraira (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings of Allah be upon him) stood for prayer, he would say the takbeer when he stood up, then when he bowed for ruku he would say the takbeer, then when he raised his back from ruku he would say "Sami' Allahu liman hamidah," then while still standing he would say "Rabbana lakal hamd."