Maliks Muwatta Book 3, Hadith Number 58.
Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasim from his father that A’isha, the wife of the Prophet, may Allah bless him and grant him peace, used to say in the tashahhud, “Greetings, good words, prayers, pure actions belong to Allah. I testify that there is no god except Allah, alone without partner, and that Muhammad is His slave and His Messenger. Peace be on you, Prophet, and the mercy of Allah and His blessings. Peace be on us and on the slaves of Allah who are salihun. Peace be upon you.”
“At-tahiyatu, at-tayibatu, as-salawatu, az-zakiyatu lillah. Ash-hadu an la ilaha illa’llah, wahdahu la sharika lah wa anna Muhammadan abduhu wa rasuluhu. As-salamu alayka ayyuha-n-nabiyyu wa rahmatu-llahi wa barakatuhu. As-salamu alayna wa ala ibadi-llahi’s-salihin. As-salamu alaykum.”