Sahih Ibn Khuzaymah

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) taught him to recite the Tashahhud in prayer. (Hazrat Aswad) says that we used to memorize it from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) just as we memorized the letters waw and alif of the Holy Qur'an. So when he would sit on his left buttock, he would recite: « التَّحِيَّاتُ لِلّٰہِ وَالصَّلَوَاتُ وَالطَّيِّبَاتُ، السَّلاَمُ عَلَيْكَ أَيُّهَا النَّبِيُّ وَرَحْمَةُ ّٰاللهِ وَبَرَكَاتُهُ، السَّلاَمُ عَلَيْنَا وَعَلَى عِبَادِ َّاللهِ الصَّالِحِينَ، أَشْهَدُ أَنْ لاَ إِلَهَ إِلَّا َّاللهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ » "All verbal, physical, and financial acts of worship are for Allah. O Prophet, peace be upon you, and the mercy of Allah and His blessings descend upon you. Peace be upon us and upon all the righteous servants of Allah. I bear witness that there is no true deity except Allah, and I bear witness that Muhammad is His servant and His Messenger." Then the Prophet (peace and blessings of Allah be upon him) would supplicate for himself, then say the salam and complete the prayer.