Sunan Ibn Majah, Chapter: The Chapters of Establishing the Prayer and the Sunnah Regarding Them

"The Messenger of Allah (saw) used to teach us the Tashahhud as he used to teach us a Surah from the Quran: 'Bismillahi wa Billahi; at-tahiyyatu lillahi was-salawatu wat-tayyibatu lillahi lillahi; as-salamu 'alayka ayyuhan-Nabiyyu wa rahmatullahi wa barakatuhu; as-salamu 'alayna wa 'ala 'ibadillahis-salihin. Ashhadu an la ilaha illallah wa ashhadu anna Muhammadan 'abduhu wa rasuluhu. As'alu Allahal-jannah, wa a'udhu billahi minannar (In the name of Allah and by the grace of Allah. All compliments are due to Allah and all prayers and good words are due to Allah. Peace be upon you, O Prophet, and the mercy of Allah and His blessings; peace be upon us and upon the righteous slaves of Allah. I bear witness that none has the right to be worshipped but Allah and I bear witness that Muhammad (SAW) is His slave and Messenger. I ask Allah for Paradise and I seek refuge with Allah from the Fire).'" [Tashahhud]