Daraqutni

The narrator named Qasim reports: Alqamah held my hand and informed me: Once, Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) held my hand and told me: Once, the Noble Prophet (peace and blessings be upon him) held my hand and taught me the words of Tashahhud (these are the words): “All verbal and physical acts of worship are exclusively for Allah. O Prophet! Peace be upon you, and the mercy and blessings of Allah descend upon you, and peace be upon us and upon all the righteous servants of Allah. I bear witness that there is no deity except Allah, and I bear witness that Muhammad (peace and blessings be upon him) is His servant and Messenger.” Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) says: When you have recited this, you have fulfilled the obligatory prayer upon yourself; now if you wish to stand, then stand, and if you wish to remain seated, then remain seated. Here, the narrator of this narration, Shababa, is trustworthy; he has separately mentioned this at the end of the narration, that these words are the speech of Sayyiduna Abdullah bin Mas’ud, and this narration is more authentic compared to the narration in which these words are combined with the words of the Prophet. And Allah knows best. Some other narrators have also transmitted it in this way as the words of Sayyiduna Abdullah, and they have not transmitted the (additional words) as a marfu’ (Prophetic) hadith.