Lu'lu' wal-Marjan

Sayyiduna Abu Hurairah, may Allah be pleased with him, said that when the Messenger of Allah, peace and blessings be upon him, would stand for prayer, he would say the takbir. Then when he would bow (for ruku‘), he would also say the takbir. Then when he would raise his head, he would say "Sami‘ Allahu liman hamidah" and while still standing, he would say "Rabbana wa lakal hamd." Then when he would go down for prostration (sajdah), he would also say the takbir, and when he would raise his head from prostration, he would say the takbir. In this manner, he would do so throughout the entire prayer until he completed the prayer. He would also say the takbir when rising from the first sitting (qa‘dah oola).