Sahih Muslim Book - 4, Hadith - 902

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا لَيْثٌ ح و حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحِ بْنِ الْمُهَاجِرِ أَخْبَرَنَا اللَّيْثُ عَنْ أَبِي الزُّبَيْرِ عَنْ سَعِيدِ بْنِ جُبَيْرٍ وَعَنْ طَاوُسٍ عَنْ ابْنِ عَبَّاسٍ أَنَّهُ قَالَ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُعَلِّمُنَا التَّشَهُّدَ كَمَا يُعَلِّمُنَا السُّورَةَ مِنْ الْقُرْآنِ فَكَانَ يَقُولُ التَّحِيَّاتُ الْمُبَارَكَاتُ الصَّلَوَاتُ الطَّيِّبَاتُ لِلَّهِ السَّلَامُ عَلَيْكَ أَيُّهَا النَّبِيُّ وَرَحْمَةُ اللَّهِ وَبَرَكَاتُهُ السَّلَامُ عَلَيْنَا وَعَلَى عِبَادِ اللَّهِ الصَّالِحِينَ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ. وَفِي رِوَايَةِ ابْنِ رُمْحٍ كَمَا يُعَلِّمُنَا الْقُرْآنَ.

It was narrated that Ibn 'Abbas said: "The Messenger of Allah (s.a.w) used to teach us the Tashah-hud as he would teach us a Surah of the Qur'an. He used to say: 'At-Tahiyyatul-mubarakatus-salawatut-tayyibatu Lillah; as-salamu 'alayky ayyuhan-nabiyyu wa rahmatu-Allahi wa barakatuhu; as-salamu 'alaina wa 'ala 'ibadillahis-salihin. Ashhadu an Ia ilaha illallah, wa ashhadu anna Muhammadan Rasulullah (All blessed compliments and good prayers 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 there is none worthy of worship except Allah and I bear witness that Muhammad is the Messenger of Allah).'" According to the report of Ibn Rumh: "As he would teach us the Qur'an."