Yahya bin Sa'id (may Allah have mercy on him) says: I heard al-Qasim bin Muhammad (may Allah have mercy on him) say that Sayyidah Aishah (may Allah be pleased with her) used to teach us the tashahhud, and she would say, pointing with her hand: 'At-tahiyyatut-tayyibatus-salawatuz-zakiyatu lillah, as-salamu 'alan-nabiyyi wa rahmatullahi wa barakatuh, as-salamu 'alayna wa 'ala 'ibadillahis-salihin, ashhadu an la ilaha illallah, wa ashhadu anna Muhammadan 'abduhu wa rasuluh' (All verbal, financial and practical acts of worship and glorifications are for Allah. Peace be upon the Prophet (peace and blessings be upon him), and the mercy of Allah and His blessings. Peace be upon us too and upon all the righteous servants of Allah. I bear witness that there is no god but Allah, and I bear witness that Muhammad (peace and blessings be upon him) is His servant and Messenger). Then she would say: "After this, supplicate for yourself."
It has also been narrated through Muhammad bin Salih bin Dinar from al-Qasim bin Muhammad as marfu' (attributed to the Prophet), but the correct view is that it is mawquf (her own words).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2842