Ibn Abbas reported: The Messenger of Allah, peace and blessings be upon him, would teach us the testimony of faith in prayer, just as he would teach us a chapter from the Quran. The Prophet would say, “Greetings, blessings, prayers, and good words are for Allah. Peace be upon you, O Prophet, and the mercy of Allah and His blessings. Peace be upon us and upon the righteous servants of Allah. I testify that there is no God but Allah, and that Muhammad is the Messenger of Allah.”
Source: Ṣaḥīḥ Muslim 403
Grade: Sahih (authentic) according to Muslim
Imam al-Nawawi commented, “In this section is the tashahhud of Ibn Mas’ud, the tashahhud of Ibn Abbas, and the tashahhud of Abu Musa al-Asha’ri, may Allah be pleased with them. The scholars agreed upon the permissibility of all of them, but they disagreed over which of them is best. The position of Al-Shafi’i, may Allah have mercy on him, and some of the companions of Malik is that the tashahhud of Ibn Abbas is best, due to the additional word, ‘Blessings.'”
Source: Sharḥ al-Nawawī ‘alá Ṣaḥīḥ Muslim 4/115
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
403 صحيح مسلم كتاب الصلاة باب التشهد في الصلاة
قَالَ النَّوَوِيّ فِيهِ تَشَهُّدُ ابْنِ مَسْعُودٍ وَتَشَهُّدُ ابْنِ عَبَّاسٍ وَتَشَهُّدُ أَبِي مُوسَى الْأَشْعَرِيِّ رَضِيَ اللَّهُ عَنْهُمْ وَاتَّفَقَ الْعُلَمَاءُ عَلَى جَوَازِهَا كُلِّهَا وَاخْتَلَفُوا فِي الْأَفْضَلِ مِنْهَا فَمَذْهَبُ الشَّافِعِيِّ رَحِمَهُ اللَّهُ تَعَالَى وَبَعْضِ أَصْحَابِ مَالِكٍ أَنَّ تَشَهُّدَ ابْنِ عَبَّاسٍ أَفْضَلُ لِزِيَادَةِ لَفْظَةِ الْمُبَارَكَاتِ
4/115 شرح النووي على مسلم
