It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to say the takbir at every rising and lowering, and would give the salam to his right and to his left until the whiteness of his (peace and blessings be upon him) face could be seen from both sides.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9996