Sayyiduna al-Bara' bin Azib (may Allah be pleased with him) said: I watched Muhammad (peace and blessings be upon him) closely in prayer, and I found his standing, his bowing, his straightening after bowing, his prostration, his sitting between the two prostrations, his (second) prostration, and his sitting between the taslim and leaving, to be almost equal.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2755