Ata bin Abi Rabah (may Allah be pleased with him) narrates that when the Messenger of Allah (peace and blessings be upon him) sat at the end of his prayer, before the tashahhud he would turn his blessed face towards the people, and this was before the command of the salam was revealed.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3974